Changes feed skipping the documents those are created using collections

Use the since=0 parameter (which is the default value) to fetch all current document revisions. If you want document contents included in the feed, there’s also include_docs=true.
You cannot get a changes feed for multiple collections. Do one at a time programatically.

collection is not a valid query parameter. See the link I left above earlier for the changes API spec. You must specify collection with the keyspace in the path as described.

You need to grant the user access to the “config” channel, or all channels inside the dbc_util_operator_navigations collection.

Channels are collection-specific. The GET user response snippet you showed is showing the user only has access to the ! channel in both collections, and so would only see documents routed to that public channel.