Background Image shows on Emulator and Real Device Andriod 9.0 but does not show on 8.1 and below

I have a xaml page where I set Background Image to some Image and it works good on Emulator(API 27) and Android 9.0 real device. When I deploy the same app to another device (Android 8.1 and 7.0), the background Image does not show in these devices.
I have created a new page and added just the background image property and it turns out the same. Worked well on Android 9.0 and Emulator but not on Android 8.1 and lower versions of android. I have also changed the target framework version of my project to API 27 and the minimum to allow Android 7.0 and that didn't help either.
I expect the background image to show across all the devices I deploy on.