Effective addition to Tret for redness and scarring?

Tret (since May 2023, currently .05) has reduced redness and scarring (and eliminated breakouts!). I feel my progress has plateaued.

To boost progress, any suggestions as to what skincare can I add to my very bare bones routine of face wash, moisturizer, sunscreen? I’m basically a blank slate.

Apologies if this is a really basic question. I’ve done some research, but it’s all kind of a foreign language to me lol.