idea: allow us to tag items to 'hide' in Field Maps. Any item that is tagged as hidden will not appear on the list in Field Maps to end users.
We have a lot of webmaps with ortho basemaps for example, which appear in the list because they are shared with everyone. I want those to be hidden. I want at least half of the webmaps and content to be hidden on Field Maps because while the content/items are shared with users, they are not used for collection and confuse the end users. Add a tag like this either to Field Maps Designer or AGOL/Portal that Field Maps will look at and obey.