How can I get rid of red discoloration from acne?

Is there any way to treat red discoloration from acne other than a procedure?

I had severe acne, but it has almost completely subsided thanks to oral medication from the dermatologist and Ecnon.

I hardly get any new pimples now, but the red discoloration remains so much that people still think I have a lot of acne.

I deliberately didn't want to leave a scar, so unless it was really cooked, it wasn't even salty.

I managed to calm it down with just medication and Ecnon, but the red marks are really lasting a long time...

Is there a way to manage red pigmentation other than through procedures?

Please recommend any products or home care routines that you have seen results from.

Just in case, I'm also uploading a photo of my discoloration......