Would it be possible for the backpacks to keep their contents and get picked up when we interact with tombstones from CorailTombstone?

When you die, worn backpacks should already place themselves close to your death point. That is, if there's not some strange mod-interaction that unequips the backpack before it is placed. I hope that's not the case.

Though I assume you're requesting them to become part of the tombstone and get automatically re-equipped when picking up the rest of your inventory. Unfortunately, due to how I've (intentionally) designed the backpacks, this is non-trivial - definitely requiring some additional work to be required by one, if not both mods.

Currently, the mod on my backburner for an indefinite amount of time, so I'll answer any questions if Corail is interested in incooperating full compatility.