Do you live in Nederland still? You can request the verification via post instead of using your passport. If you lose your DigiD login, you can also create/request another. The account acts as a pointer to your official ID. My wife made a mistake and had to attempt the process 3 times. Not a problem.
Living overseas it took them several yesrs to realize that making a trip to an embassy overseas just to get a registration code was not a feasible way.
Luckily Corona made them realize you can also do it over a Skype call.