.NET MAUI port of date reminder program

I have a simple date reminder program I need ported over to .NET MAUI:

MiniMinder

I have already written the C# class to do all the date calculations for upcoming events, but my progress in adopting MVVM and using local storage is slower than I had hoped.

The project only has 4 pages and must use the MVVM design pattern. It should work on Windows, Android and iOS. I am looking for clean, well-structured code that I can learn from.