Theres a sight that let's you look freely at a Genshin character's 3d model and choose to see separated parts, including the clothes exclusively
Including character costumes (ex. Barbara and Jean's summer clothing)
https://gamesfashionarchive.net/viewer/2177/16

Also I will be making small drawings of oc duos/groups for holiday and post them as little doodle dumps
And Lin Xiang will get a Latern Rite costume
But you didn't hear that from me