That’s a very large access panel. Not sure what the rest of the space looks like but I’d probably get a large kitchen pantry storage area to block that access panel (that is, if it’s legal to do so).

It's an open hole. Unsure what it may have been used for in an older home. Due to the walk through area I can't put a piece of furniture in front of it. Looking more for how to decorate the wall above it. Thank you 😊

Hang the quilt over it. Or get a piece of canvas art to cover it. You don't want to decorate over it. Anything will be too high. Personally I like it the way you have it now.

Can you add shelves and put decorative pottery?