How to query Xamarin.Froms controls, which examined by repl() don't have id and text. One example is a SwitchCell with Text and On properties set in XAML. I would rather prefer a solution (if it's possible) that doesn't require editing XAML views.
app.Tap(c => c.Marked("NameOfControl"));
It also depends what controls etc. Paste what u have on Repl() or screenshot it so we can help. You didn't provide enough information.