The Dutch counterpart of the Duden (Van Dale) says 42,000 words. My take is that they are probably going to be about the same, because the counting methodologies are probably going to be somewhat different (e.g. do you count well-known semantically transparent compounds as separate words or not).
https://www.nu.nl/wetenschap/4308088/gemiddelde-woordenschat...
https://www.duden.de/sprachwissen/sprachratgeber/Zum-Umfang-...
Didn't find a source for dutch people.