Yes ouch. I have no idea why having fixed the issue they didn't make it standard. I understood the flywheel change on your car helps.
MMC very likely did not make it standard because the emissions no longer meet the certification. Then, strictly speaking, the car is no longer TÜV/MOT capable. A manufacturer cannot afford that. But the dealers should be allowed to do it with the blessing of MMC.
Mine has passed sever mots
JohnV6 2022 CX Plus Four 2025 MG ZS EV aka Trigger