Can this be made compatible with inventory sorting mods like https://www.curseforge.com/minecraft/mc-mods/inventory-sorting please?

It works for expanded storage chests, don't see why it should not work for these backpacks too:

This would be on Inventory Sorting or Spinnery to fix. This comment seems to imply Inventory Sorting will offer the fix, but I can talk to vini if it's not resolved.

I don't plan on moving to vanilla containers, mostly because it would require an entire rewrite of the mod (and I would prefer to use Spinnery anyways).