Loss all items on death

In my minecraft world, I died to a creeper because I didn't have my chestplate on, I had my elytra. I went to the exact same spot searching for my items (yes I came in time It took me less than 5 mins to find where I died) I searched for a long time to find literally nothing. I had so much stuff on me, I had full maxed out netherite tools and armour plus my elytra and trident. There was no cause for my things to disappear and stay gone like that. I spent hours getting the stuff that I died with and I grinded my for days to get everything I died with, and on top of that I was over level 100. I never got my stuff back and now i'm extremely mad I lost everything. Mojang you better fix this bug because I am not happy about this.