I tried a few things, but the only way was to install and use them on github. Is there a way to simply blur in the xaml file?
for example
I want to blur the grid background. Could this be possible?
There is no build in blur effect in Xamarin. You need an extra tool SkiaSharp or Sharpnado. Related Question on StackOverflow:
Make current screen into BLUR on Xamarin.forms
Another way is to create your own control:
https://www.c-sharpcorner.com/article/how-to-create-and-use-a-blurred-image-in-xamarin-forms/