The story has been around for quite a while that Harry and Meghan use child actors or children of friends/acquaintances for photo ops. It's entirely believable, the interaction between the "kids" and Harry and Meghan is stilted and obviously staged.
The obvious was the 4th of July parade, a few years ago. There was no interaction between Harry and "Lili", the child appeared to want nothing to do with Harry carrying her or being around him. When she was with Meghan, she was crying, she wasn't excited at all to be at the parade.