if I have communications with someone through the internet with a homeserver. I would inevitably give out my IP address. Is that a bad thing? In my country they don’t have services like that, RTCing would be a bit sluggish using available euro servers.
Yes very hard to do in modern society. But reducing your digital footprint is still a good idea 😉
You can do a reverse search on the domain and IP and it will usually show which ISP and maybe the city or larger region you are in.
Also depending on the domain name, some require to have public contact details available. Some domain registers offer to proxy those however.