Hi,
I was caught off guard on my first 12 Mini display removal.
It turns out that Apple display seal is wider, thicker and takes more heating to penetrate past the seal.
This complicates things by having the seal let go on the Lcd above on the frame seal.
So what happened was I put the pick under the screen and not the screen frame, this led to lifting the Lcd off (breaking it) and leaving the frame still attached to the phone.
So now I make sure I have enough heat (without going too far and damaging the Lcd) and coming into the edge at more of an upright angle to make sure that I get under the frame seal.
Unfortunately you’ll have to replace the Lcd and hopefully it’s not bricked in the true sense.
Hope this helps