I’m so sorry for your DH and you, having to go through all this. Hope he recovers quickly and you get home soon.
If AON calls to check on your DH, then ask them exactly what you need to do to file your claim. How you claim the cruise fare lost, hotels, meals, airline tickets, etc.
Did you get a copy of the medical records from the ship? If not, ask Princess assistance team for this to be emailed to you as soon as possible. You will need to keep receipts and records of everything.
As soon as your home, with all the records, then you’ll be able to submit to insurance. The medical: they will probably tell you to submit to your medical insurance first. Just ask them for clear instructions.
Wishing you two all the best.