ah ya possible with gaming, I know mine isn't from that however, just definitely not a smooth experience as my 12 Pro was for whatever reason

Different problem, that person is complaining of overheating. As for the OP's issue, yes I've had lag on mine the entire time of owning. The lag I'm seeing is lagging in animations like when swiping an app to the background sometimes it kinda hitches for a moment. Happened from the beginning, through 2 updates, and now on 16.1 no change.