so seems like the Fenix 6 series have now three types of glass: Gorilla glass, Sapphire glass and "Power glass" (solar). Most probably the Sapphire will be the most scratch resistant glass, but what about "Power Glass"?
No worries. I look forward to seeing Ray's response to your question if applying a screen protector will hinder the solar charging function. I believe he said he will be testing this at lunch time today.