I did not receive the Chevrolet with special camouflage and the 20th anniversary Porsche 918

Things are like this,I like Forza Horizon very much, so I purchased Forza Horizon 5 on the Microsoft Store and the Steam platform separately. For convenience, I used the same xbox account, but today I found out that if I buy Forza Horizon 5 on the Microsoft Store to receive For the gift of download vehicles, such as Chevrolet or 918 vehicles with special 20th anniversary camouflage, they will no longer be displayed and obtained on the Forza Horizon 5 that I purchased on the steam platform. I want to apply to get the steam platform vehicles again because of the same , I previously purchased Forza Horizon 4 on both platforms at the same time. I can receive these vehicles with special camouflage at the same time. Does anyone have the same problem? Can you tell me how to solve it?