typing /give @s trident[item_model=bow] will give a trident whose model is offset from where the player holds it instead of a trident that looks like a bow. I believe this to be an issue with the way Minecraft deals with 3d models like that of the trident, because I was able to do this with /give @s tnt[item_model=bow] with no issues.

It seems to be different depending on which item you tell the game to use, but the results are inconsistent.