I do the same: starting unplugged. This works well as I use nnml to store my emails and have all nttp groups under control of the agent.
To avoid forgetting about queued emails, I have my queue group at level 1 and it's the first group in the Group buffer view. To manually send queued emails, it's "J S" and you don't have to be in the queue group for this: it works from the Group buffer. But, for me, when I toggle to plugged status, all of my queued emails are sent. If you wish to remain unplugged, J S will send them regardless. -- Eric S Fraga via gnus (Emacs 30.0.50 2023-09-14) on Debian 12.2
