SIP Client or Screen-To-Screen Intercom

Hey Max, hello community I stumbled across tessera just a few days ago, even after purchasing blindly a 7" jc1060p470

As I am dreaming of replacing my less-than-ideal Dahua Indoor Screens, one of the regular use cases we do is unit-to-unit-calling. Prior to finding this project, which is ideal for more use cases than I dared to dream, I had a concept (not yet code): Either the units act as a SIP client with an ESPHome Plugin I found, or I would use some audio two way streaming. I guess that a SIP plugin would even allow more wishes, e.g. Two-Way-Audio for some Door stations

This does not look like it fits into the "what is a plugin" section of tessera, and I am not even convinced this is a good thing for the roadmap; however I would love to understand your point on this idea, and maybe some markers on how I should contribute it to the project.