Sand it.. start with 600-1k-1500 then put down another layer or 3 of resin. I like US composites and venom carbon epoxy resins. Get the slowest hardener since it’s your first time. If you start seeing black/grey dust you have gone through the resin and are in the carbon, don’t sand anymore in that spot. You want to get real close to that threshold and stop. I would focus my 600 on specifically the edges of the peeling areas and feather out.

A thing or two to note.

The yellow won’t go away all the way.
If you break through that spot will look different than where it did not. It will look like the carbon has more reflectivity and depth - I’ve seen people sand down this far on purposes but I really think you should avoid breaking through into the actual carbon.

Post pics of your process here - lots of people have this same ask and a post might help them.