I've found an issue with the SfSchedule. I've only tested it in weekview so I don't know about the others.
When setting TimeIntervalHeight="-1" and TimeInterval="120", it displays fine in Android and iOS, but in UWP it only uses half the height available.
Likewise, if you set TimeInterval="180" then it uses only a third of the available height.
Thanks for the great controls by the way. You folk are doing a great job =)
Please let me know if you require any further details.