Are you using the native/stock zigbee (endpoint) table & tools? If so, those are notoriously incomplete.
The community-developed zigbee map app is much better, but it still may show some gaps.
But bottom line, if the plugs perform properly from the device page, it's probably not worth worrying about. And it can take longer than 2 days for the zigbee mesh to settle in -- I'd give it a week or so.
