Privacy? I’m sure that Google tried so hard to monetize it and after so many years they didn’t found a way, couldn’t use it for ai training too, so they decided to turn it off and save millions in database costs.

They still exfiltrate user movements for improving Google maps, it’s just that they don’t need to keep them indefinitely or for years or maintain a nice interface for that

I’m an amateur, not a professional

Set the A record to your IP address and CNAME to @ to all the subdomains you need

You run a proxy on your server (the easiest is “nginx proxy manager” that has a nice web UI), then open your router to port 80 and 443 to nginx proxy manager (NOT the web UI configuration port!)

Then you instruct the proxy to route the traffic according to the URL.

Someone coming to 10.172.172.172 with no URL? Drop the connection.

Someone going to if.example.com? Forward to 192.168:8080 and so on