My son did it too but it carried on into his toddler years and became a habit. I would say it is okay for now but stay clear of too much screen time. Also, don’t encourage nor discourage it. I don’t feel it’s a cause for concern now as hand flapping is also a way of processing information as babies are highly sensorial.
Can be a sign of autism better to check with pediatrician
My baby girl does it when she is curious and excited.
Pano po yung hand flip?