I have the same issue.
I noticed when I was having issues getting the game to load today that I was able to see my "EA" achievements. For some reason, I was missing my earlier achievements, like the one for finishing chapter 1. How did I get the later chapter achievements if I never finished 1?
Anyway, after getting "not so fragile" on steam, I replayed chapter 1 and got that achievement plus the chapter completion and the thistle one on EA.
I wonder if the last steam achievement will pop if you get everything in the EA app as well.
The only problem is that I have no idea which ones I'm missing because I can't replicate the error I got that let me see the proper EA screen. I've looked everywhere and have no idea where to see my achievements. I'm using the steam deck so I can't even open the stupid EA app without starting a game, and the in game EA app overlay doesn't show EA achievements.
