The SelectedIndex property of the picker control will not be maintained when loaded inside the ItemTemplate of SfListView. This is because while scrolling down the list, the elements created in the View will be recycled and only the BindingContext of the SfListView item will be updated. Since BindingContext is not set for SelectedIndex, its value gets reused while scrolling. However, you can overcome this by binding the SelectedIndex property.
You can assign a value to a property in the data model and bind the value to SelectedIndex property as like below code snippets.
You can also add items into collection for binding picker items as like below code snippets.
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