No idea what it is or how it installed so tough answer .

I have no clue what that is ,is it tile ? Show th whole wall and the space please post the pics here in a comment DO NOT start another post .

That will depend what it is and how it is affixed to the wall.We can't see the entire bath, it looks like a very narrow mirror atop...something. More pics, more info etc

https://www.houzz.com/discussions/6411000/how-to-houzz-how-to-ask-questions-how-to-get-helpful-answers-and-e#28784466

Was a medicine cabinet removed and that placed on wall?

The mirror is placed on the backsplash which is on the wall.

A few pics

My guess is you will have to replace the drywall behind it before putting anything in its place.

Seems like a bigger deal than I thought.

When the tile comes off, it will damage the drywall behind. How much? Hard to say.

So.......Drywall isn't hard, nor is paint.

Yes, you pay someone to do the drywall or its a diy: )

You might be able to replace just the mirror - with one that’s just shy of the edge of the tile so it just hints at it. That may be a few hundredish for the custom mirror.

That is very interesting.

Before you order a custom mirror or start a drywall project, you might want to try painting it (prime well first) the same color as the wall (or another color that would coordinate with the bathroom). Might make it look more like a frame and less like the ”glam” version of metal corrugated roofing.

(It also might also look terrible. I am not sure- it could go either way.) If it works out, that‘s a lot cheaper than the other options. And if not, you are only out the cost of paint.