They seem to have a way with the kids, especially Kate, and know how to calm them down.
There has been a deliberate intention recently to get the kids out in public events, especially the older ones like George and Charlotte.
The Queen’s frail health seems to have hastened the appearance of a transition, I don’t want to read too much into it, but we have been seeing Charles increasingly take over public roles of the Sovereign, including at the military parade today, while the Cambridges are behaving more like a Crown Princely family. Even assuming that the Queen still has many years to live ( and hopefully she does), I don’t think this trend in how Charles/Camilla and William’s family are seen in public will be reversed anymore.
The only anomaly is that, had it not been for Megexit, the Sussexes would have been given a higher profile too by now.