I noticed the "bicycle tree" in Scotland which has encapsulated a bicycle amongst other things as it has grown. It reminded me of a very old graveyard I would play in as a kid. The oldest side was all old trees and one day I noticed one of the trees had a couple of gravestones up in its boughs. I always wondered if these were really lifted up there by the tree and if so whether that's unusual.

I would check here for examples: https://old.reddit.com/r/TreesSuckingOnThings/

Trees don't grow in a manner which can typically lift things. It's really unusual - and requires either distinct circumstances, or highly technical measurements between gauge pins.

Those gravestones had help getting up there.