https://wccftech.com/galaxy-z-fold-2s-flex-mode-could-damage-the-devices-screen-protector/

When the Galaxy Z Fold 2 was released, many people were pleased to see that Samsung had made some improvements as far as the overall durability was concerned, given how the original Galaxy Fold was fragile at best. Especially from the internal screen where Samsung had placed a thin protective layer, and when people tried removing that layer, it killed the screen.

The Galaxy Z Fold 2 also has the same layer, but experts can be removed and replaced if you need to that. The built-in screen protector is actually tucked behind the bezels, so you need experts to remove and replace that.