Slate ax - wireguard server - connected client list

At vpn dashboard, the wireguard server client page, a green dot shown beside name of client, does it mean the client is connected?

The green dot still shows even client disconnected.

Yes, it mean the client is connected.
When the client has not sent keepalive to the server for a period of time, it will be judged to be disconnected. So the status does not change immediately when the client closed.