Okay, the replikate thing is WEIRD. She does look quite good in a lot of th e Kate stuff, less so the Pippa stuff. But still.... WEIRD.
I think the SA press varies in its interest in this tour. But more importantly, I think the tour has raised the profile of these issues and charities internationally. Chris Ship wrote a piece to this effect commenting that he wouldn't usually lead the ITV news with a story about South Africa. And if that drives donations, interest, expertise to SA and these charities, that can only be a good thing.
Plus I do think that the royal family play an additional role behind the scenes in terms of connecting people and initiatives. Kate took a while to get there (but then, to be fair, she had few contacts of her own to start) but Meghan has gone all in on that from the start. So I would not be surprised if many of these charities see additional support in the form of other high profile visitors or expertise or whatever, organised or suggested by Meghan/Harry.
[As a side bar, I remember an amusing story told about Richard Branson (I think) and Nelson Mandela. The details are fuzzy now but basically, RB had donated some money or publicity or something and the two of them were at an event together to celebrate it. At this event, there was talk of the need for a new local school or library or some such thing, and basically Mandela turned to RB and said something like, "we really need this. Do you think you can help?". And RB told the person who told me the story afterwards that when Nelson Mandela publicly asks you to do something, you just do it. So he did! I think there is an element of that with the royals in that they can access these kinds of people and resources.