Gravestone is not appearing on 1.18.2 and all of my stuff is gone, I tried using the restore command and every other command but it keeps saying I have no gravestones even having died 3 times with a lot of stuff

Do you have any logs? Have you changed anything in configs? If I will fix this I will need either logs that say where something went wrong (which it doesn't always do) or reproducable steps from a fresh install of minecraft basically. Thanks for reporting in, but I'm sorry. I require more info to fix. If you or anyone else stumbling across having this issue can provide that, I'd really appreciate it