Hey fellas, now that our time as OMotM is coming to an end, I feel like making a cool post to explain the relevant archetypes/structures in the tier. And I think the tier is in a fine state, with multiple viable strategies, I may have forgotten some.
Special Attackers oriented HO:
Main core

Thanks to Chi-Yu it is much easier to break pass Ice Scales than last gen, but most of the time Chi-Yu isn't the one actually breaking the defensive cores as it is quite easy for them to prepare for its STABs, so you pass the ability and let the rest of the team do the job. We are in a lack of options for Special Attackers with good abilities, so this kind of teams usually run around two physical attackers that can pass strong abilities, like Supreme Overlord Kingambit, and a Sheer Force user like Copperajah or Braviary. Indeedee-M deserves a mention here, while useful on any team that doesn't use Priority too much, it has a special place in this archetype as it can take advantage of all the abilities used in them and become a powerful wall breaker and sweeper.
This was my main team for the second half of the month:
https://pokepast.es/1e7a5a560160f2f7
Palafin Priority Spam HO:
Main core

Thanks to Punching Gloves letting Palafin break pass Fluffy, this archetype become a natural enemy of Fat and can easily beat other HO teams, as long as they don't involve Psychic Surge, that has been on the rise as of lately. For this kind of teams, you try to fit stuff that power-ups Palafin, and sure is compatible with a lot of stuff thanks to Jet Pounch being a 60BP Punching move that is boosted by Sheer Force because of reasons. Scizor provides Tech while taking advantage of the other abilities and being a good check to Pixie team, then there is Pelipper for Rain, Pawmot for Iron Fist, Quaquaval for Moxie, Copperajah for Sheer Force, among other options. Is an interesting structure, as Palafin doesn't provide an ability to the rest of the team.
Fat:
Main core

This was heavily nerfed lately and while still popular, it sure feels a lot weaker. You pretty much stack the best defensive abilities available (Fluffy, Stamina and Ice Scales) and from there build a hard stall, a bulky offensive team or some kind of balance. If you are using Fluffy, something you must also have is a way to handle Fire moves, the most popular option has become Well-Baked Body Dachsbun, but you can also try with Flash Fire users like Arcanine or with Drizzle from Pelipper. Espathra is also a key member as thanks to Opportunist you can ignore opposite set up sweepers if used correctly. Wo-Chien also offers a powerful defensive ability you may try to fit to not lose too hard to physical oriented teams that can ignore Fluffy or Stamina. A way to beat opposite fat is important if you want to end games in less than 24 hours, Annihilape is a great wall breaker to use here, but some prefer to double down on stall and run Pressure Corviknight.
Sharpness HO:
Main core

Population Bomb is everyone's favorite gen 9 meme, and a fun game to play with your friends involving it is "who can find the strongest combination for a nuclear bomb Maushold?". Trying to focus solely on Maushold doesn't usually end well but there is a lot you can do to get a good team out of it, Sharpness is a fantastic ability compatible with the move and Gallade isn't bad either for a donor. When playing with multi hits moves is important to have options to break pass Stamina, Sacred Sword is good there but immunities and resists make it quite easy for it to fail as its job, to get around this a second answer to Stamina like Super Luck can be quite good and Honchkrow has two sharp-boosted stab moves in Night Slash and Aerial Ace. Some other Pokémon you find on this kind of teams are Supreme Overlord Kingambit, a hustle user like Flapple paired with No Guard Lycanroc-Midnight, Scrappy Flamigo to hit Ghost-Types with your Normal and Fighting moves, and Indeedee-M to not lose against priority teams.
Pixilate-Multiscale Bulky Offense:
Main core

Dragonite has become one of the scariest Pokémon in the tier, it not only provides the team with a powerful defensive ability in Multiscale, it also has a strong priority move in Extreme Speed that this structure tries to take to the next level, by turning it into a Fairy move and then turning Dragonite into a Fairy-Type with either Protean or Tera. Toxtricity is popular on this kind of teams, thanks to Punk Rock it can destroy defensive cores with a powerful Boomburst and can use Shift Gear to outspeed Psychic Surge teams. From there, you look for ways to power-up both Physical and Special moves at the same time like Adaptability from either Basculin or Dragalge and Surpeme Overlord Kingambit, and maybe a few things more that can give you a stronger Extreme Speed without caring about the special side like Tough Claws.
Sun HO:
Main core

While maybe not the best option out there, if played correctly it can beat all the other offensive teams as nothing can match your speed thanks to Chlorophyll, you can also use Protosysthesis to go even faster, but it may be better to get the offensive boost from it most of the time. Psychic Surge is quite important here to not lose to priority, and then you need power to not lose to fat, Sun can be physical or special oriented, so you can try to fit most of the same options the other offensive teams use.
Merciless-Corrosion:
Main core

With the Purifying Salt ban spamming status effects has become a viable strategy again, Corrosion and Toxic Debris let you Poison whole teams and then Merciless gives you a nice power boost. This structure still needs to be explored more, but can be found paired with Fat for some toxic stalling. Dragonite has a nice place on this kind of teams as it offers both, defensive qualities on Multiscale and offensive power in Merciless boosted Extreme Speed.
Berries:
Main core

While the Prankster ban affected most teams, this one was hit the hardest, it is still viable but requires help from Fat cores to survive hits and that often makes it hard to fit all the berry related abilities you need for the team to work, Harvest, Cheek Pouch, Rippen, Cud Chew and Gluttony.
A popular option on this kind of teams is Pawmot for an infinite Revival Blessing thanks to Harvest and Leppa Berry.
Gale Wings HO:
Main core

Not that popular, but still worth mentioning, Gale Wings is a quite strong ability and when paired with Rock Head from Sudowoodo or Basculin-Blue you don't have to fear the recoil from Brave Bird. Another unique option this kind of teams have is Serene Grace Air Slash from Dudunparce, you can try to Tera it into Flying or just let a different team member use the combo, like Vivillon who can't miss thanks to Compound Eyes.