If a nullable property gets used in the Execute part of a RelayCommand, and that property is already checked against null in the CanExecute method, what is the proper way to handle the CS8602: Possible dereference of null warning for the property?

[ObservableProperty, NotifyCanExecuteChangedFor(nameof(FooCommand)]
private FooType? _fooObject;

[RelayCommand(CanExecute = nameof(CanExecuteFooCommand)]
private void Foo()
{
    SomeMethod(FooObject.ID);    // gives CS8602: Possible dereference of null
}

private bool CanExecuteFooCommand()
{
    return FooObject is not null;
}

private void SomeMethod(FooType? fooObject)
{
}

Which of the ways would you consider the correct way?

Another null check of FooObject in Execute?

Use of nullable type ? in SomeMethod(FooObject?.ID)

Use of the null forgiving operator ! in SomeMethod(FooObject!.ID)

Or is there any other way i don’t know of?

Could FooObject ever become null in between the CanExecute and Execute part?