Hi!
Yes, it's repairable/ can be filled by "laser welding" and then some further work on the case.
I'd recommend to have this done by Rolex directly, either through an AD - or if within your vicinity by dropping it off at a Rolex Service Center.
That said, there are also jewelers/third parties offering this type of service. They can easily be googled - no recommendation though.
Kind regards,
Oliver