I love group chats, but I’d instantly leave or mute any of them forever if “good mornings” ever became a thing there.

And I’d like to suggest an alternative to a mindless “good morning”: Actually share something noteworthy or check in with the people in there! Share an observation of your surroundings, an article or cartoon that made you (actually) smile etc.

Too hard/time consuming? Then the “good morning” was disingenuous/formulaic anyway and likely served no purpose.