I agree, and I wonder whether they have influenced one another or if it is just a trend in Europe generally. In either case, hopefully it will be maintained as they grow older.
I don't think it is a trend in Europe only as it seems to have started with Meghan, The Duchess of Sussex (as she wants to be called).
I hope they don't keep it as they grow older as those baggy pant suits are quite frankly atrocious.