Just wanted to follow up with my camera lens cover repair in case anyone else need the info. I used a heat gun to loosen the glue. It was just a few seconds and I was able to ply out the glass with a dental sharp tool. I was careful not to scratch the camera lens itself. Cleaned the residual glue with rubbing alcohol and Q tips. Once again thanks to CornholioGSM's tip on the Redmi Note 7 glass I ordered it. It was the exact size, except that I had to install it upside down (the writing will be upside down) so the larger opening is on top.
Nice not to have halos in my pictures. Thanks