I have checked the default setup of RadListPicker and indeed, on iOS, the item's text is not wrapped - this is due to the different rendering on iOS with bigger fonts. You can quickly resolve it by setting ItemLength property of the control - you would need to adjust the item length, so that two rows to be visible. Here is a quick example:
<telerikInput:RadListPicker Placeholder="Pick a name!" Grid.Row="1"
I've also attached a runnable example for a reference.
On a side note, ListPicker is a different control than ListView and any updates on the ListView are not applicable to ListPicker.
I hope I was of help. Let me know if I can assist with anything else.
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