https://spacedock.info/mod/2407/EnbyKerbs
EnbyKerbs adds eight new textures based upon the default kerbal textures. Since they mix up the gendered characteristics of the existing Kerbals, you can think of them as "transgender" or "nonbinary (n.b. or enby)." Those gendered characteristics are: the head shape, the hairline, and the eyelashes.
For reference, the default heads are:
rounded head shape with a flat hairline and eyelashes
square head shape with a widow's pe