When it comes to the Teenage Mutant Ninja Turtles adaptations, it's safe to say the Heroes in a Half Shell are the main focus. Some iterations do give Master Splinter his time in the limelight. But it's usually reserved for when villains like Shredder and the Foot invade the sewers and come looking for a brawl.
Source:https://www.cbr.com/tmnt-mutant-mayhem-jackie-chan-splinter-scene/