@naln1 It's a shitshow, basically. There's hen/hun that some people use, but that a lot of other people have trouble with (somehow singular use of conventionally plural pronouns doesn't quite 'feel' right in Dutch). There's also 'die', for which there's some arguments: https://langzaldieleven.nl/ -- but it doesn't seem to be very widely adopted among queer folks at least.
Personally, I tend to use 'die' unless otherwise specified, but honestly none of the options are great... (and that's not even going into crap like gendered job description names :/)