Hello,
I would like to confirm that the SfPicker does not have a mode where it works like a Xamarin Picker. I saw your previous answer here:
https://www.syncfusion.com/forums/135613/sfpicker-context-is-not-clear-how-does-it-work-no-good-sample-using-mvvm
In the sample of that thread you have a button that triggers the dialog. For the SfPicker to be a drop in replacement for the Picker it would have to show a read-only Entry with the selection and when the user taps that entry it pops up the dialog. If this is not possible at the moment, please consider adding such mode in the future.
Thanks,
Jose