Microsoft won't install Forza Horizon 5

This is what helped me and got Forza to download.
1. Go into the Microsoft Store and search Forza Horizon 5 Standard Edition.
2. Next you want to click on Forza Horizon 5 Standard Edition and you want to click Install from the Xbox app.
3. This will take you to the Xbox app and when it takes you to the Forza game scroll down and look at the tab named "Included in this bundle" And click Forza Horizon 5.
4. This should take you to the regular Forza Horizon 5 game rather than the Standard Edition, And then you want to click install and this should download the game.

Hope this helps have a good day!

If there is no order on your Microsoft order history it means that it's not successful you may need to re-purchase the game or check other possible Microsoft account where the game was purchased.

If that's the case, please search the game directly on the Microsoft Store App.

Or sign in to https://account.microsoft.com/billing/orders then locate the game order, click the game icon then choose install.

It's saying that I don't have any orders and the app is saying I still need to buy it.

Were you able to try and install it on Microsoft Store App?