After Banks, it should show at start of each new game if the mods you have active will block you from having achievements. I haven't tested it with this mod specifically, although I suspect it should be comatible with Ironman. Just try to start a new game with this mod activated.
When you get to the screen to set the kind of galaxy to generate, if the mod breaks Ironman, there should be a red text on the lower border of the screen, saying that the game you're about to start will be with disabled achievements.

Well then i guess it works fine then, for i have played 8 hours with it in Ironamn with no warings about that. I have earned the basic ones that could be a way easier to just start and see if i got the achivement. most mods get a clearsign like "more ships and classes" and "Star Wars ship mods", i cannot understand they allow you but in return you won't get achivements. Like i activated like 13 mods on day one i tried Stellaris and i could play it in Ironman with no errors. This makes me very very confused, for i did not get colonize achivement when i had those mods on.

If Ironamn button is broken, it is annoying. Especialy that Hearts of Iron 4 ironman button actually works to check what works and not.

If the mod doesn't change the checksum, it won't revoke achievement rights. This one does not.
[Sorry for the necro]