Cast classes to classes with generics

I am reflectively getting classes and their declared classes, and I want to pass them into a function that takes classes, but it has generics on it.

// classes to pass into function
ClassPath.from(MyParent.class.getClassLoader())
  .getTopLevelClasses()
  .forEach(classInfo -> {
    // checks...

    Class<?> clazz = classInfo.load();
    for (Class<?> declaredClass : clazz.getDeclaredClasses()) {
      genericFunction(clazz, declaredClass); // the problem
    }

  });

// the function to pass into
<E extends Extendable<? extends Parent<E>>> void genericFunction(Class<? extends Parent<E>> parentClass, Extendable<E> extendableClass);

// classes used in generic function
public class MyParent extends Parent<MyExtendable> {
  protected class MyExtendable extends Extendable<MyParent> {
    
  }
}

public abstract class Parent<E extends Extendable<? extends Parent<E>>> {
  
}

public abstract class Extendable<E extends Parent<? extends Extendable<E>>> {
  
}

The problem is that I have no idea how to cast or reflective run that genericFunction() with the Class<?> objects.

I can assume that the classes that ClassPath finds are compatible (e.g: they all properly extend Parent and Extendable in inner classes.)

I can change my (likely) messy and overcomplicated generics on the function and classes.