I've never seen it available onboard; a call in to Azamara may be helpful. I've never seen anything advertised through Azamara for it; may be that they cooperate in the sense that they work with the company for drop off and pick up?
That is a TA thing then, not an Azamara issue, so you can't blame Azamara for that. I'm very close to a TA that lost ALL commissions for 2020 and most of 2021. I understand why some would now have a cancellation clause, but the cruise lines don't.
I've never seen an IPA, even with the ultimate package.
Azamara does allow you to bring as much of your own onboard as you like, when you embark or at any port you stop at; that may be something to think about doing.