Popup Content Template

[so2992]

Hello, I'm trying to build a popup with radio buttons and add to each radio button a flag and some text. The problem is that Android does not support this type of radio button if I'm not using a content template.
I've modified the below xamarin radio button sample from ContentPage to Popup.
https://github.com/xamarin/xamarin-forms-samples/blob/97d6825e2ba3aa64667695f3c43224c9171e51e5/UserInterface/RadioButtonDemos/RadioButtonDemos/RadioButtonControlTemplatePage.xaml#L1

I've attach the output from Android and iOS after selected one of the radio buttons.

Am I doing something wrong?
Thanks!