Is there any hooks to entity unloading?

[Slarper]

I want to teleport pets to their owners before they are unloaded.

But I only found Chunk unload event, and when it fires, all entities on it have already unloaded.

[jacoobia]

I haven't tested this so I could be drastically wrong but ClientLevel has the removeEntity which gets called for a bunch of Entity.RemovalReason reasons, one being culling/unloading due to chunks. So using a mixin injected at the head, you should be able to check if the reason is UNLOADED_TO_CHUNK and if the entity is a TamableEntity, teleport it to the player and cancel the initial method call.