I think the guide was pretty helpful. A little intuition will go a long way, though.

Really? It seems exactly like any other screen replacement

That's awesome!

I agree, the backing plastic could be cut a bit more precise by the factory, to ensure better alignment.

Make sure screen connected is properly seated. Careful not to crease or damage the flat cable when installing everything.

Damaged screen connector or LCD ribbon cable?

That's a problem on many Pixel 7 Pros, even without prior screen replacement. Probably happens if you apply pressure to the front of the screen, on the left side, about midway between top and bottom of the screen, right? That's caused by a wire shorting short somewhere around battery cable or antenna cable, if I recall correctly.

No. Completely unrelated.

How did you "unplug the fingerprint sensor from the LCD"? The fingerprint sensor is glued onto the back of the LCD.

It's extremely difficult, without specialized (expensive) equipment. There is a piano-wire method of separating them, but it requires a lot of experience (many failed attempts) and is often not successful.