That's a good point. I doubt you peruse the things i like but if you happen to know of something involving anthro donkey girls that are full female let me know.
I can't speak to all their content, but blue squirrel does more games where you play as the person doing the transforming, or at least you transforming people is a part of the gameplay. Have a look and maybe you'll find something you'll like there.
https://bluesquirrel.itch.io/