I’d buy a replacement and at least have it on hand. Wrap it and sleeve it if you want (probably need to sleeve or otherwise prevent further abrasion anyway), but have the replacement so you can swap it out in a few minutes if needed.
Reason 1: Only time it has an opportunity to fail is when you need it. Therefore, it will fail when you need it. And there’s damage to the braid, not just the outer jacket.
Reason 2: My history with stuff like is most of the time, particularly stuff I sort of knew needed attention but it never climbed all the way to the top of the priority list, it fails at some stupid time like 9:00 on Sunday night when I absolutely have to be at work at 8:00 the next morning, can’t get out of the driveway if I can’t get the tractor working, and have no way to source the right part. So I’m freezing in the dark trying to get bubble gum and duct tape to hold 2600psi good enough and long enough to clear the driveway before I run through all the hydraulic fluid in the tractor and in the buckets in the shed, while kicking myself for not spending $20 on a hose I’d probably pay $200 for if someone handed it to me immediately. Or I spend $75 Saturday afternoon at NAPA on a custom hose I could have gotten for $25 at Parker Hannifin Monday, but Monday is too late.
As always, your machine, your problem if it fails at an inopportune time, your money, and YMMV…