The IFIXIT battery kit for my Google Pixel 4a is here. It includes a tube filled with something to heat in the microwave, to soften the glue that’s holding the OLED screen. I also have another, crafty, microwave oven option for warming up the glue. It was a gift from a friend years ago, during a bout of lower back pain.
I won’t rush into this job. Before tackling it, I’ll watch all of the available videos on the repair, to see the various techniques people have used, successfully… or not.