To clarify I am using minecraft version 1.19.2 with the forge modloader

The first person mod being used is:
First-person Model (Forge/Fabric) by tr7zw

The normal bow animation is locked and doesn't go up past a certain point preventing the arms and bow from blocking the player's view in firstperson.

(Still some view blocking on the firing animation when looking straight up but it's an acceptable amount.)

The crossbow animation has no such limit on it.

Here's what the first person view looks like

This could be fixed by limiting the crossbow animation the same way the bow animation is limited.

Another "fix" could involve adding an option for the crossbow aiming to be one handed and only the reload being two handed. This would make it clearer where the player is aiming and if the crossbow is in offhand with a primary weapon allows for other players what they are working with/against.