I will try this, but the Lone Ranger was OUT of his mask 90% of the time. Almost any superhero is.
Look at the most recent Avengers movies. They did everything they could to get them “in uniform” but without their masks.
They have opened the possibility up. It turns out that the "never take your helmet off" is NOT the way, it is only a small cult of Mandalorians (in which Din was raised)that follow the edict.
Now that Bo-Katan, the Man'Dalor (leader of all Mandalorians) has been introduced sans helmet the door is open for Mando to eventually accept the practice.
Plus, Pedro Pascal, has actually been fairly vocal that he wants to be able to remove the helmet.