Hi Sascha,
Thanks for contacting Syncfusion support.
Currently, our SfRating is not compatible with the Net 7 project. Because in dot Net 7 the GetEffectiveFlowDirection() method was removed by the Maui team. So our SfRating control crashed in Net 7. We request you will use our control in Net 6. In an upcoming weekly release on Dec 28th 2022, we will include this fix and let you know the details.
Thanks,
Chozarajan P