Oof.
Okay that might have been too little information. I will offer two more hints.

1. Location is within 800 blocks of spawn. ( which excludes a very large portion of the map )
2. Chest is in “line of sight to the white wool X” when looking at it using the angled map (not top-down!), ergo it is NOT even buried. 😉

I hope that helps those treasure hungry scurvy dogs out there.

Baz