When I search for a map in Field Maps (version 21.2.1 build 462) I can see a lot of maps I am not the least interested in, let alone I would expose my field workers to them:

How can I set this so that my field workers only see content, when shared with them, from my organisation?
I found Organization - Security in agol and disabled 'members can search for content outside the organization' but that doesn't seem to do anything in Field Maps.
I never saw this in Collector, I sure hope it's a configurable feature in field maps
Thanks in advance for your time,
Bert