Thank you!!! This works perfectly! It would be great if this was part of the documentation for UWP related MonoGame specs as it is very useful for certain scenarios.
I was able to figure out an alternative workaround by creating a singleton that in includes the game but also initializes the SwapChainPanel object. The object then has to be attached to a XAML element in OnNavigatedTo() by SomePanel.Children.Add(MySwapChainPanel) and detached in OnNavigatedFrom() via SomePanel.Children.Remove(MySwapChainPanel). This works as well but the solution above is more elegant.