Is this type of fretboard damage fixable?

Can you put a circle around the damage?

Playing guitar for 20 years. Shred all the time. Can’t see a thing wrong?

Maple fretboards are finished and if you play them it tends to wear through. Maple fretboards that have been played a lot tend to have very obvious grayish finger marks. Call it a badge of honor and keep playing. Rosewood doesn't have this problem, but I've always felt that a guitar that has been played a bunch is cooler that one in pristine condition.

There’s very little you can do that won’t make it look worse. From personal experience, trying to fix something like that will cause more grief than just leaving it.

If you feel like learning the hard way though, a dab of superglue sanded down flush may make the chip less noticeable.

I'm not sure exactly what in the photo is the wear is you're referring to. I'd say if it plays fine you're fine.

As an owner of a 2002 Ibanez RG-170 that I picked up in garage sale for $80, the dings and scratches on its maple neck have led to it having a unique sound that I simply can't replicate on any other instrument. Most other guitars feel too young and clean to me now, with a lack of resonance and presence that seems to come naturally to older instruments that have seen a lot of use.

Per @j_gets - save that mojo - if she plays nice, I'd let her ride. You've got barely any damage there, and if you're playing well, folks will be looking at you, not your guitar.

People pay big money to fake this. Keep playing and enjoy.

Guitars which have worn naturally over the time have more mojo than case queens. If it isn’t interfering with your playing I’d say let it ride.