So, are the following accurate conclusions?
You cannot connect Android devices to a Jitsi server unless the Jitsi server has a registered domain name and full chain certificates.
A Jitsi server using an IP cannot accept connections form an Android device.
The consequence of the above conclusions is that a person wishing to deploy a Jitse server has to purchase or already own a domain name from a domain registrar in order to serve Android clients. I take it this is an Android requirement that cannot be overcome. A very subtle domain name registrar “tax”, if you will – all in the name of security.