Hi Huntsman,
Greetings from Syncfusion Support.
We have checked and tried to reproduce your reported problem in the below sample. But unfortunately, we were unable to reproduce it at our end. Since the appointments are rendered properly in the UI for both desktop and mobile mode.
So, kindly try to reproduce your problem in the above sample and share the issue replication steps or share a sample that illustrates the problem which would help us to provide the solution at the earliest.
Regards,
Balasubramanian S