Let radio buttons and other choices be allowed to connect with SharePoint sites. Right now only the dropdown menu will connect to data and you can't change it.
If PowerApps is going to replace InfoPath, simple things like radio buttons or check boxes must convert over from SharePoint lists seamlessly. At this point, PowerApps is unusable to modify forms in SharePoint due to the loss of controls such as radio buttons, checkboxes and multi line text fields. In my recent conversion these controls all vaporized from my existing form.