The entities disappear from the overworld, both those that have items that were given to them by a player or those that have a label, especially the armor supports and the items that the armor support has are erased and it is something very complicated because I lost an armor by netherite. These mobs in particular disappear like piglins, hoglins, horse skeletons and villagers these disappear from the overworld, nether and end happens when entering the dimensions again or when exiting the game correctly and when starting the world again the mobs are no longer there and no send no message that they have died by accident but only disappear as if they never existed.