Re: Not getting the Achievements for Insanity 2 or Paramour 2 on ME2 on Series X
Did you earn the achievement within your gamertag (outside of what you actually see in-game)?
If yes, that has been an issue since day one,even after the patch. I have several in-game achienvements blacked out in ME2 as well.
If no, then the solution to getting them for the Xbox achievements has been to play the insanity setting again on ME1 (if you have a save before the final battle that was completely played through on insanity that would be awsome), it should pop. Same with the paramour, by remoncing Liara (or Ashley if play as a male character).