Item stopped showing up

Hello! This is my first mesh i made and it was showing up last night at 24k poly, so i decimated it via a tut i saw on here and got it down to 1.1k. Its not showing up now and im not sure where i went wrong. and now when i try to use the mesh that did show up it isnt working. I'm so lost, i made it in blender 3.3 and tried to convert it to 2.79, that didnt work so i remade it in 2.79 and it did work up until now. Ive included the file, if you have any tips or advise on how to fix this it it would help my 13 hours of suffering ;---;

1.1k poly blender file : www.simfileshare.net/download/4787031/
CC item ; www.simfileshare.net/download/4787040/