It seems like you are facing some issues with the tires on the Scania P93 Beta version in FS25. The missing correct painting of the tires and the rear gage tires not appearing can be frustrating. These are common issues that can arise in modding and can be fixed with some adjustments to the mod files.
To fix the missing correct painting of the tires, you may need to check the texture files associated with the tires in the mod. Make sure that the texture paths are correctly set in the material files and that the textures themselves are correctly applied to the tire models.
For the rear gage tires not appearing, it could be a problem with the model or with how it is being loaded in the game. Check the model files to ensure that the rear gage tires are properly defined and linked to the rest of the vehicle. Also, make sure that the mod is correctly installed and loaded in the game.
If you are not the mod creator, you may want to reach out to them for support or see if there are any updates or fixes available for the mod. Modding can be complex, and sometimes issues like these require adjustments to the mod files or scripts to resolve.
Remember to always backup your game saves and mod files before making any changes, so you can easily revert if needed. Good luck with fixing the issues with the Scania P93 Beta version in FS25!