Yeah, IF it’s possible, we should try to repair the damage.
I think it was one of the saints who gave a penance of taking a pillow outside, opening it, letting the feathers go and having the penitent catch all the feathers, and put them back. It couldn’t be done, so the saint used this an example to show what, say, gossip is like.
In a case of theft, where possible to do restitution, it needs to be done. With some other sins, when it can’t be done…or could even make matters WORSE, it shouldn’t be done.
I’d use that as a guideline. Ask yourself if it would even help, at this point, to say anything. If it would, then say it. If not, then don’t. If you don’t remember, you don’t remember. Nothing further can be done besides confessing, being sorry, and repenting except to trust that God’s forgiven you.