Your detailed information has been so helpful to me - this would make an excellent travel article for those wondering what awaits them if they choose to travel now.
I assume if one is asymptomatic, and if they get a negative test early on, they can return home before 10 days and I will bring some monitored self-test kits in hopes of that. In your case, did you receive a Letter of Recovery from a local doctor? I read in a NY Times article of an online site, Quick.med, that provides them after a virtual visit for I think $75.00
This is all Information I had hoped Azamara would provide to passengers being taken off the ship for isolation, if only in written form to take with them. I realizes much depends on local covid rules and the country one is returning to, but something more than putting you in a taxi (with others, no less) to a hotel that wasn't expecting you is essentially doing nothing.
I was told several months ago by Azamara that they had a "care team" at each port to assist covid passengers, which I imagined would involve follow up calls, or ways to contact them. Either they have disbanded, or they have a very narrow definition of care.