Light control over 230V lines - are there switches with PLC/IP communication?

Is it possible to realise remote control of switching lights on and off in such a way as to simply change the switches in the house to ones that could communicate with some system by sending a signal over the 230v power line? Just each one has its own IP or other I2C number and you control them via some protocol?
I don't want to rip up walls to lay new control cabling and wifi won't necessarily work everywhere, although maybe, maybe ....
It will be about 20-30 points.

A smart switch won't get along with a dumb bulb fixture. Luminaires should also be at least after some basic IT courses.

>>21728012 Can I ask for at least some example names of systems so I can have a look?

I thought that the matter would be solved by simply changing the switch in the box and it would simply be an electronic on/off relay, which would filter out the control signals from the 230 v line

I don't know about it at all, but logically, if you transmit a coded signal from a switch, it must be decoded on the other side, i.e. in the particular lamp that is to be switched on. At least that is how I imagine it.