PieFed now both retains deleted posts (not the actual OP content but the discussions beneath it) for those who have the URL and also offers helpful labels rather than simply showing a blank page, like:
The author of this post has been banned/deleted so they might not see your reply.
Example: https://piefed.social/c/comicstrips/p/1660086/taco-tuesday
Hot damn how I love my PieFed!! π»π°π