Well, if we are new in Jesus, we no longer are the deserving sinners we used to be.
So, in any case, we do not deserve to be punished for what has been forgiven, I would say.
We have been changed so we are now children of God; we in Christ no longer are the ones who did those things. We have been changed in our character so now it is not our character to do those things.
But if someone believes that no person, at all, deserves punishment, this would be wrong, I understand.
And in case a child of God does something wrong > for that particular item, he or she might deserve some sort of punishment, I suppose, but not for what is past and forgiven.
But what works is real correction of our character so we become incapable of the wrong. This works better than just punishing. Ones can change behavior because of a punishment; but if there is no real character change, they will just do the same thing again or switch over to doing other wrong things.
So . . . whether we deserve punishment or not, I can see how God knows it can't work. We need the correction which is encouraged in Hebrews 12:4-14.
What we deserve might be only a side-show issue, then. But it is good to be humble and admit how we could be getting punished quite a lot, but know if it would really work or not
There are ways I might punish myself, but this can be a trick to try to pay God off so He does not give me real correction which would stop the sinning.