Hi Siggi,
Thank you for contacting Syncfusion support.
Based on the provided information we have checked and we are unable to reproduce the mentioned issue “while tapping the Schedule Appointment, Appointment argument of CellTapped event in Schedule is null in Xamarin Forms (Android) from our side. We have prepared simple sample based on this scenario, please find the sample by the below link.
We have checked by tapping the Appointment in Schedule WeekView and we have set Display alert for the details in the sample with our latest update version 15.2.0.43.
If the given sample doesn’t meet your requirement, could you please revert to us by modifying the provided sample based on your requirement along with its proper replication procedure to reproduce the issue. It will be helpful for us to check on it and provide you the solution.
Regards,
Subburaj Pandian V