As I wrote on the duplicate of this question:
I had to dig to find it. Criteria for any given project's project-protection is usually on the project web page:
https://www.wikitree.com/wiki/Project:Netherlands
This page is first in Dutch; the English version follows. Right above the English-language header "Welcome to the Netherlands Project" is a green box that includes the following:
"As of Saturday September, 4th 2021 the Dutch Roots Project asks of all it's members to stop adding the project as manager of profiles. This because we are waiting for the results of the discussion about new criteria for this before we want to add more.
It is recommended to place the Netherlands Project Sticker in it {{Netherlands Sticker}}.
This decision is temporary and will be adjusted when the new criteria for Project Managed Profiles and Project Protected Profiles are known.
Check the Project Managed Profiles and Project Protected Profiles for more information"
It doesn't look like there has been any change since 2021. I am aware that the project lost most of its active volunteers about that time. So maybe it just hasn't been able to build back up. But in either case, it looks like, for the time being, project management of profiles is being discouraged.