Thanks for contacting Syncfusion support.
We would like to inform you that LayoutManager cannot be applied based on ViewCell and it is common for all templates loaded inside SfListView. We regret to inform you that your requirement to apply different LayoutManager for different groups cannot be achieved in SfListView. But you can use default StackLayout and Grid inside your DataTemplate to customize the view based on your requirement. Please let us know if you need any further assistance.
Dinesh Babu Yadav