here are a few modsets for Pokemon Sword (and maybe Shield but I haven't tested on that game)
make sure you're on the latest update (1.3.2) - this might not be required for everything, but I haven't tested without the update

to install in ryujinx, rightclick the game, go to the Atmosphere Mods Directory, and then copy in the subfolders from the modset you want to use (don't copy the modset folder itself)
then, start the game and set the clothing to whatever is mentioned in the pics and readme

each modset has mods I've tested to work with each other, and the different modsets may or may not conflict with each other, who nows

you will want to use pkhex to edit your save to have all clothing so you don't need to fuck around with trying to find it:
https://projectpokemon.org/home/files/file/1-pkhex/
load up your main sav file (it is literally called "main"), you can find where it is by rightclicking the game in ryujinx and opening the User Save Directory
go to SAV > Trainer Info > Misc > Give all Fashion items to unlock all the outfits
then export your SAV

no clue how to use these on a real hacked switch
have fun

the stuff in other-mods can be enabled alongside these modsets
they're also a little bit more complicated to install but you should be able to figure it out