Sorry, I don't fully understand your first sentence but if you are saying the Prince & Princess of Wales should attend more gala events I would like to point out that they need to cover a wide variety of events in different areas which can be clearly seen from their very recent activities
So, if my memory serves me correctly, they have attended a major suicide prevention event, visited the Isle of Bute, William has visited an area in Wales which suffered floods and some farms, Catherine visited an OAP luncheon club in Sussex and I think there are a couple more that I can't remember the details of. They are preparing to go to India for the Earthshot Prize
Throughout the year they are involved in State Visits, State occasions, charities, regional visits, investitures (William not Catherine) sporting events, events associated to their patronages, fund-raising events etc etc