I worked on my model and finished it and booted vivecraft fabric mod into VR mode.
Joined a singleplayer world, saw my vanilla arms and tried to open inventory.
Game crashed with an error log.

Model has split limbs for bendy joints, and was not seen during VR gameplay.
the model worked normally in singleplayer in NON-VR mode.

The error log of the event is attached below.
crash-2023-03-01_20.01.53-client.txt

The mods in the mod folder are as follows:

Pekhui v3.7.0 1.14.4 -1.19.3
CPM v0.6.5a
Vivecraft 1.18.2 - 0.0.12
Mod Menu 3.2.5

Forge version of Vivecraft worked but arms are positioned wrong in inventory's display window (maybe third person) and avatar was constantly walking in place in display window or mini-vive-camera's third person.

EDIT: I tried it with the Essential mod (Forge version, aka the VR Client version) to see my character on the screen, and it seems to be in working condition in Essential Mod's display window, so the inventory display window and potentially the camera window are the only bugged ones.

EDIT 2: Apparently the glitch in the display window and other player's view are existent, because the walking animation was automatically on in the Forge version (both mixin and vr client), and removing the animation from a copy of my model and reuploading it fixed the Forge bug. Still waiting for the Fabric fix :)