I was wondering if you could add a mod that I have been keeping my eye on.
This mod has the option to change the player's gender or age. Each combination is complete with custom hurt sound effects. You might find a female zombie frolicking in the dark. Use this on your server to synchronize all the settings for each player across all connected clients!
Males: Just like normal Minecraft, but with the old hurt sounds!
Females: Are slightly smaller than males, have their own default texture and have their own hurt sound.
Children: Are smaller, have their own default texture based on gender and age, and have a higher sound pitch
Zombies: There are occasional female zombies that have the female model and their own texture
This text is shown in the CurseForge website, https://minecraft.curseforge.com/projects/gender-mod, all credits of the mod go to the owner.