How to make a project wiki available to everyone in the ADO organisation

Hello

I would like to create a project wiki which is available to everyone in the ADO organisation.

When I try to add other teams to it I'm getting an error this can't be done as that group belongs to another project.

I have given Project Collection Valid users read access to the wiki under wiki security however not everyone can see it.

The only option I found so far was to add people as Readers to the project where the wiki is hosted but that means I'll need to do that with every new onboarding, plus I don't want them to see other parts of the projects just the wiki.