IMHO, when M isolated H for full control, she underestimated their draw outside the royal USP, so we are witnessing a reverse ferret where M is ruthlessly using her children to try to reforge a royal connection. But M's kids will always be classed as Hollywood nepo-babies.
Unlike the cousins of H's generation, the Sussex kids have been isolated from their royal relatives and royal activities with royal backdrops. H's cousins are routinely present at garden parties, ride in carriages at Ascot, attend the Carol service and walk to church at Easter and Christmas. Each activity refreshes the cousin's association with one or more of KC3, W and G, the three that matter to the monarchy.
With dismal ratings, I am not sure what M can do next after this flopcast as she has already suffered a massive downgrade from Spotify to Lemonada.