The lag of the connection of a player is measured with the ping. All players have different pings.
1.- Is there any technology to match those delays?
2.- Could Lichess show both ping during the game, mine and the rival.?
Yes, odoaker2015 I know that. That link only shows my lag, I want to know the lag of my opponent during a game. Something like the remaining time shown by the clocks. Also, as you know, lag is not constant but fluctuates around a certain value. I would like to know if I play against an opponent with lag 12ms and mine with 30 ms, for example.