Is your feature request related to a problem? Please describe.
Customizable Player Models has an API to animate when the player speaks
Can you please add compatibility with this mod?

Describe alternatives you've considered
No voice mod has added functionality yet, sinse simple voice chat is the simplest and most approachable, i thought i'd request it.

Additional context
API documentation: https://github.com/tom5454/CustomPlayerModels/wiki/API-documentation#voice-animation
Mod src: https://github.com/tom5454/CustomPlayerModels

Simple Voice Chat generally doesn't add compatibility with other mods. You can either contact the devs of the custom player models mod to add compatibility, or you can create a compatibility mod.
Because of this, Simple Voice Chat has an API: https://github.com/henkelmax/simple-voice-chat/tree/1.18.2/api

so, from what i understand...

you both have APIs and neither is willing to work with the other because it's too much work to add a support function for custom player models?

seems pretty moot to have an API if you aren't willing to work with other devs and find a middle ground.

leaving it up to the players to figure out feels down right sloppy.

It does not make sense to put such a feature in any of both mods. A compatibility mod is perfectly fine for this. Adding a dependency of another complex mod into a project will always make porting to newer versions slower. Thats literally the middle ground.
I am not interested in creating this compatibility mod. I have enough other stuff to do. I am maintaining about 50 other mods. It feels pretty ungrateful that you basically "demand" for this compatibility to exist.

I made the API, so everyone can do whatever they want.