Only authorized people (I.e “team” members) are allowed to change the list.
Anyone (might, if not encrypted) comment on list items or the list itself. Tools allow you to see/hide/filter this easily.
You can already propose to add items to one of my lists for example, tagging one of my lists’ npub like nostr:npub1f0v4ryys99lgeq55qc7503hu39703aahtup94u7dk8dtqfkjlwkstjyppp or nostr:npub1tfzcrk7ly9u6e38rhl2rrm06vsgl793r9m8zf3kz78wq5qx0nnvqfqy0wj
The decision to move those items you propose into the list is up to the list owner