Yep. I've seen quite a few free-to-play gacha games of the "Dress up your pretty princess in cool clothes and do cute activities in a relaxing, no-stress world." variety that have serious anticheat. There's no leaderboard, no multiplayer, it's totally singleplayer.

Why the serious anticheat? To try to prevent you from cheating your way to possession of all the cool clothes for your pretty princess.