Custom model data for bow after 1.21.4?

I'm trying to make a resource pack with a custom model for bows, I don't wnat to change the properties I just want to be able to have different textures for the bow. Here are 2 different ways that i tried. I'm not a programmer, I look for tutorials online and try to do it myself but this one is kind hard.
I was able to change the textures of a sword, i'm putting here the file too.