JSpecify Support or annox:annotate with type-use target

I would like to use JSpecify on the generated sources, but it requires that the annotations are on the type-use-level.

Is there already an option for that (I couldn't find one)?

If not it would be nice if it could be supported by either a special JSpecify-Plugin or by implementing type-use as an allowed target.

I found https://github.com/eclipse-ee4j/jaxb-ri/issues/1845 but it seems stale and is an issue in an impl, so I'm not sure where the appropriate place for an issue would be.