>>53189978Nintendo owns the rights to TCG, because they went and bought it (as 1/3rd rights holder to the overall) and published it themselves.
Game Freak own dev rights to Pokémon and they prefer to charge for their games, where possible (even remaking Kanto, so they didn't need to bother making a Switch port compatible with Home).
I expect a remake of an older game, before Game Freak bother with adding games to the NSO.