In a stroke of luck for the RHO team, the MEV bot operator sent RHO an on-chain message indicating they were willing to return all of the funds, although they first demanded that RHO "admit that it was not an exploit or a hack, but a misconfiguration on your end. Also, please provide what you are going to do to prevent it from happening again."
RHO is built on the Scroll Ethereum layer-2 network. Scroll temporarily paused the chain as RHO investigated the loss.