i'm afraid i can't offer any specific help for using these. it depends on what program you use for your vtuber model and cam capture.

when i made these (3 years ago, keep that in mind), i was using Vtube Studio. I haven't done anything vtuber-related in years, I don't know what's changed.

these files are literally in a folder as PNG images. however you import images is how you swap, that's all the guidance i can provide, sorry.

i can only see the asexual flag mug.. how do i see the others?

how do you swap between them?