Some items aren't appearing, especially those you unlock via achievements/trophies
For example the nether, diamond, sponge, cobblestone, and slime base skins not showing on playstation version of minecraft and when i aplly any of it from my PC then reopening minecraft on ps4 the skin wouldn't load, this issue exists since achievements cosmetic released/started.

I uploaded 2 screenshots, one from my ps4 and the other from my phone.