I honestly dont remember. I’ve watched the episode about three or four times and I dont recall them saying anything about it being bound to anyone or anything.

This prison world was bounded to both Lizzie and Josie and maybe since Josie still alive prison world stays too, no? In TVD if I'm not mistaken prison world was attached to leader of Gemini coven - I may be wrong I watched TVD long time ago, so since Josie only living member she is leader of the coven so until she is alive prison world too, idk

King-i see

Ghoster-its a messy situation cause one side is alive, the other died so it seems it could go either way based on writers direction

My guess with other side dying world could be less stable but not destroyed, but its just my guess nothing more

Yes that could work