Well, she looks good. What seems to be a problem with all Dutch nobility is that they are a bit "uppish", hence Amalia doing well in noble circles. The worst of them is Eloise, I follow her on Instagram and she is so full of herself, showing off her privilege that it is really disgusting (IMO).
"all Dutch nobility" is quite a statement when you're only talking about some daughters in the royal family.
Dutch nobility consists of abt 10,000 people in over 300 families, quite a few of them older than the current line of monarchs (which started in 1813). I have met/know/am friends with members of at least 50 of those families, both young and old, and every single one of them is very well-mannered, friendly and not at all uppish. The 'noblesse oblige' is real, them being active in all kinds of voluntary service. Yes they own vast tracts of land, castles, art, money but you wouldn't know from just looking at them.
Amalia happens to be the heir to the Dutch throne, so even if her family were boorish, she'd still be top dog one day.
I suspect there are rather practical reasons behind Bea allowing her sons to marry clever commoners (much like Margrethe 'made' her sons marry non-Danish women), one of them being to avoid gossip among all the noble ladies/mothers.
Much like te BRF are basically Germans, our RF are basically Germans. Norfolk a.o. are much much older (and 'noble') than the house of Windsor (S-C-G) even though they can trace their royal ancestry back for centuries. The DRF do have close and trusted friends among the Dutch nobility, but also quite a few among the German (former) nobility.
For many decades we had a royal family consisting of just 2 parents and an only child. Only when Beatrix and her 3 sisters birthed a total of 11 grandsons and 3 granddaughters to Juliana, our royal family exploded. These 14 grandkids have gotten at least 31 great-grandkids. Only a handful (basically Wax/Max's daugthers) are in the line of succession. The rest all got a proper education and work, (though oftentimes having the right surname opened doors to high paying jobs, investments and whatnot).
Ppl know about Beatrix's grandkids because they are the Triple A's, Friso's kids, and first grandchild Eloise and her siblings. Ppl know about Margriet's 4 sons because they are a bunch of competitive men. The rest are obscure, apart maybe from the illegitimate son of Irene's son Carlos. Idiot Eloise is the only one blatantly making a fool of herself.