I don't have any real personal experience with route planning in The Netherlands... More than 20 years ago we used Tulip Cycling (
https://www.tulipcycling.com/) to plan a family bike vacation. They did not provide paper maps, but provided a Garmin GPS with the route preloaded. They provided bikes, luggage transfers, accommodation reservations, and emergency pickup...
I've been thinking about doing a self-planned tour in The Netherlands for a few years. The logistics of getting a recumbent bike to ride there have been a challenge.
Please report back about your tour plans!
If you are looking for paper maps, this website seems to have a good selection:
Here are some online route planners I've seen Dutch cyclist youtubers use...
Info:
People recommend Kamoot and RideWithGps apps for The Netherlands...
Good luck,
Jon