If so, they haven't appeared together in a main line game yet, so we don't have any data on how they would interact. Both players have access to the same battle gimmick though, so you can counter that way.
If one wants to limit a gimmick, one should use reasons, that actually make sense. Like adding powerspots (maybe via the minecraft beacon mechanic) that allow dynamaxing for players having the band, but disable keystones (if a player has both)