ME3 - Unwavering not unlocked

Any help please? I just finished the original game on Xbox Series X back-compat on Insanity, and got the "beat the game on Insanity without changing since leaving Earth" achidvement and I expected to also get the "Unwavering" achievement (Finish all single-player missions on Insanity.) But it didnt unlock?

I look in extras, and it says 25/27, yet looking at the list of missions online I have done them all.

- Tuchanka: Turian Platoon

- Tuchanka: Bomb

- Rannoch: Rescue Admiral Koris

- Rannoch: Geth Fighter Squadrons

I made sure to so these when they appeared. I have a save before each of them. The last three appear completed in my journal but Turian Platoon has disappeared. I know I did it though, because I remember the plot and decisions. The turian commanders son died after messing up their mission.

- N7: Cerberus Lab

- N7: Cerberus Attack

- N7: Cerberus Abductions

- N7: Cerberus Fighter Base

- N7: Fuel Reactors

- N7: Communication Hub

All these are listed as done in my journal

- Grissom Academy: Emergency Evacuation

- Attican Traverse: The Rachni

- Kallini: Ardat-Yakshi Monastery

- Arrae: Ex-Cerberus Scientists

Rachni helped build the crucible, Jack and her students were all ok, got Samara from the monestry and the scientists with Jacob were rescued.

- Earth

- Mars

- Palaven (Menae)

- Sur'Kesh

- Tuchanka

- Citadel (Cerberus)

- Geth Dreadnought

- Rannoch

- Thessia

- Sanctuary

- Cerberus Headquarters

- Earth Return

- Citadel Finale

Well I finished the story, so I got all these.

Anyone have any idea why or how 2 of them might have been missed somehow? I remember I think skipping one of the missions end cutscenes, would that have mattered?

Thanks!