Why Forza hub is not syncing my real Forza Horizon 4 achievements ?

Have you tried doing a hard reset of your console by holding down the power button for ten seconds before releasing and pressing the power button again to see if that sorts out the problem that you are having with the game?

Did it but its still showing my in game stats less than what they actually are

It says i own 55 cars whereas i own 462 and all the level ratings are too low

Could you suggest any other solution to the problem ?

Hello,

Be sure to check and make sure everything is synced correctly, try logging out and logging back in

There might be an issue with Forza Hub itself in relation to Forza Horizon 4, Have you checked the Forza Forums That might be the best place to go.

I have just finished earning all the multiplayer achievements for Forza Horizon 2, and now I'm moving on to getting some achievements in Forza Horizon 1, I'm kinda disappointed though, since I won't be able to get any of the 1000 club challenges DLC achievements,
and won't be able to earn any Forza Hub points for completing those challenges, since I am unable to get the DLC.