Your requirement
can be achieved using the "Opened" and "Closed"
events in SfPickers control. Setting the layout's opacity to 0.5 in the picker
opened event will blur everything except the picker and setting the layout's
opacity to 1 in the picker closed event will make the layout visible again. We
have prepared a sample for the same, and please get it from the below
attachment.
Please examine
our example. If your requirement is different from this, please revert with
more details about your requirement. It will assist us in providing an
appropriate solution as soon as possible.
Please refer the below user guide documentation for more
information.
https://help.syncfusion.com/xamarin/picker/events
Attachment:
TimePicker_68016a6a.zip