Please add multi model data items to ModelEngine 4

I have a problem with my rp generated using MEG, I have 1853 custom entity models and meg generated the rp with 52k model data items in leather horse armor, and I saw that when I spawn just an entity my fps drop from 600+ to 20, and the problem seems to be caused because of all model data items are in the same file and Minecraft while trying to render them drops the fps.

I used spark mod for watching it: https://spark.lucko.me/n9pIVrGBDW

Maybe a possibility solution for this problem can be adding the possibility to split model data items to all leather armors items, I tried to search in the api but importing models api is WIP.

Lemme know please, kind regards

Paper: latest version 1.21 Meg4: latest dev build