My sim died while I wasn’t playing , no urn or tombstone.

Hi @kaym99 Have you thought of going back to an earlier save? This is done directly via your folders, if you can work with the date and time of when the sim was alive, this is the best idea, imo...

There's a good guide here to go back to an earlier save, at Carls Sims 4 Guide for directions on doing that and salvage from an earlier time before it happened

Hope this helps.

Sasha