WildcardTypeAccess.hasNoBound() returns for wildcards bounded by an array type, that they have no bound.
Example query:

import java

from WildcardTypeAccess w
where
  exists (w.getUpperBound())
  and w.hasNoBound()
select w

Query console link

The issue appears to be that this predicate only checks for TypeAccess children, however ArrayTypeAccess is not a subclass of TypeAccess:

Maybe it would suffice checking that any child expression at index 0 or 1 exists (or would that also match annotations somehow)?