This is showing on the Regent website (UK version anyway):
As a result of the tragic events which took place in Israel over the weekend our Custom Air Department will be closed on Monday and Tuesday , October 9th and 10th , as our air team is working diligently on rebooking guests both currently on the Voyager as well as those embarking on October 15th.
If you are contacting the air team regarding the two Voyager sailings impacted, our air team is in the rebooking process and will be forwarding the new air schedules as soon as they are available. Due to the number of guests impacted we are unable to take custom air requests. We ask for your patience while we work through this process.