How to run a service in the background on iOS, even when the app is closed

[teklot]

I want to be able to run a periodic service (simple condition check) in the background on iOS, even when the app is closed. I did some research and found this can be done by overriding the FinishedLaunching and PerformFetch methods in the AppDelegate class but it seems the AppDelegate : AvaloniaAppDelegate<App> does not include the aforementioned methods. Is there any solution or alternative to achieve this? Thanks!