Ozone is produced naturally, the ozone layer will return itself to pre-industrial ozone concentrations simply by leaving it alone. You can call it regeneration or repair or healing or whatever you like.

No expert either, but it seems fairly apposite. The atmosphere is continuously generated by a vast complex system. This incorporates many homeostatic mechanisms tending to push the system back to its dynamically stable state. As long as we don't push the system too far, removing recent perturbations will result in auto-repair.

This is one of the few sources of hope that we can step back from the ecological-collapse abyss. In many cases we just have to get out of the way. Unfortunately, we probably won't. Replacing complex evolved enduring systems with primitive technological short-lived ones makes heaps of cash.