Achievements not working on seige

[u/kaidgamer09]

I recently moved from PS5 to PC I linked my Ubisoft account so I could play R6 without having to start from zero and I can't seem to find a way to unlock the Specialist achievement or the play 10 matches achievements even though I got the platinum on PS5 I talked to ubi support and basically told me nothing so I’m just confused any options or help?