I’m not sure if it had that sticker, I removed them when the device first arrived. You can use a little heat on the adhesive around the edge of the screen to open it up, mine has this PCB inside.
I would recommend pruning everything except the hardware config, and test if the display shows the LVGL test screen when no pages are defined. That would help you diagnose if it’s different hardware or just a difference in our respective home assistant environments.