I have some redness around my nose and mouth area that I would like to reduce
The goal is to restore and strengthen your skin barrier, especially in the area where you get the redness. To do so, I'd suggest to go fragrance-free for all of your skincare, add a daily broad-spectrum mineral-based sunscreen in the AM and switch your moistruizer for a more protective one. I'd also recommend not to use the Ascorbic Acid serum in the area where you get the redness.
A few product suggestions:
(Stop Kiehl's toner & iS Clinical serum fully)
You could also try adding a gentle azelaic acid serum, can be used either AM or PM: https://whatsinmyjar.com/product/revox-just-azelaic-acid-10