There is hope:

Thank you for raising this issue. We are aware that our current implementation does not yet work on GrapheneOS. This is a temporary situation we plan to resolve before this app goes public.

https://github.com/MinBZK/nl-wallet/issues/34#issuecomment-4...

Until then, I'd recommend every Dutch person (or probably every EU person, since this could also influence other wallets) to upvote/heart the initial request in that issue to show that there is serious demand for this.