Video of the DatePicker and TimePicker behavior on macOS.
In the video I click the up- and down arrows to increase and decrease date and time. I doesn't work if I type in the numbers.
The solution can be found on GitHub:
How do I solve the problem ?
This appears to be a Forms bug given:
I would suggest filing it here:
Xamarin Inc., as a wholly-owned Microsoft subsidiary acting as a separate legal entity, adheres to the Microsoft Privacy Statement: Privacy & cookies