As others have said, this is a known issue that isn't planned on being implemented currently: https://github.com/spring-projects/spring-framework/issues/33934

However, they did implement type level mocking in spring framework 6.2.2, and are considering doing the same for @MockitoSpyBean. So if that gets implemented then you could consider switching to doing type level mocks on the class, if you don't care too much about what they return.

If you do need that when(...) though then you'll probably need to just stick with putting that @MockitoBean and when(...) in each class where it's used.