League of Legends and Teamfight Tactics are separate games. Their settings should be sandboxed.

Changing a setting in one game should not change the same setting in the other. If I want to shut off minimap movement in TFT, it shouldn't disable it in LoL as well. The two games should not affect each other's functionality.

Just because one game reuses many of the other game's assets doesn't mean that they are played the same way or that people find the same settings convenient in both.