ZBXNEXT-3776 tricked me with its subject, as it looks like that topic was about LLD discovery, but I think the same functionality should exist for network discovery.
After looking at debug logs for discoverer process, it looks like this could be easily done;
On each refresh of the discoverer process, it performs the following SQL query;
Would a button in Zabbix PHP that updates the table similar to <excuse lazy code>;
That way on the next refresh the check finds that nextcheck is indeed
and starts discovery? Just spitballing here, but I'd love to be able do to this both from a "hey we have a new rule" and a "verify the rule is working" POV.