Jitsi and Google Meet both use WebRTC. Although it sounds like a great technology, it's really CPU taxing and not inclusive as some of our students didn't have high-end hardware and connection, and we just couldn't run our school on Jitsi/Google Meet. However, Zoom in the browser is equally bad, so, it's subpar on Chromebooks.
Jitsi is good but it makes CPUs run hot.
That looks great but is the room access security the obscurity of the room name?
You can set a password for the room in the bottom left panel.
No, it is not.
Jitsi Meet is a clone of Google Meet; Zoom is a different product. Although Jitsi borrows some features, it lacks strict control. When working with young students, you understand why there needs to be stricter control on who can talk, who can present, raise hands, run polls, etc.