LoR letter that didn't get completed

Can universities see who I added as recommenders even if they didn’t submit their letters? I assigned a LoR request to my coach in December, and even though I did remind him a few times he still didn’t submit a letter and to be honest that is okay with me because I didn’t really need an extra LoR. (it was like “if I can get an extra it wouldn’t hurt”)
So can schools see that one of my recommenders didn’t complete the LoR? Do I have to remove the request on the Common App even it’s been almost a month I submitted my applications? Or will it just not show up anywhere?