I’m afraid I would work on the assumption that you won’t hear anything by Monday. It’s a rapidly changing situation that inevitably requires some fairly last minute planning.
As for cancelling, I’d agree that embarking in Trieste instead of Ravenna would constitute a material change and warrant a refund. Royal, of course, may disagree. Unfortunately you’re in a bit of a catch 22: until Royal says otherwise, nothing has changed and you’d be expected to board in Ravenna as normal.
But by the time they do advise you of any change it may be too late to cancel your hotel and flights with no penalty. Hopefully your travel insurance would cover most of that. And yes, with Avios bookings you can cancel up until 24 hours before departure for a full refund less a £35 fee (or whatever the cash element was if it was less).