Uh, no. It’s like this in some, but I’ve played plenty that let you quit out during enemy turns. In a variety of different RPG sub-genres. Not RPG match-3s, cus I don’t play any others, but otherwise, yeah.
And even if it was normal not to have that as an option in some sub-genres of RPGs, match-3s that can basically infinite loop during an enemy turn, should have a way to quit during the enemy turn, 100%.