while supported by android and IOS they use different code. you can use conditional compilation in your app.
for IOS see:
https://learn.microsoft.com/en-us/dotnet/maui/macios/universal-links?view=net-maui-9.0
for android see:
https://learn.microsoft.com/en-us/dotnet/maui/android/app-links?view=net-maui-9.0