Looking at how it goes in many European countries at the moment, I highly doubt if Indonesia will see foreign tourists before earliest August 2021. As long as we need Covid-19 protocols I do not expect foreign divers visiting.
I agree, unfortunately - I'm talking to people in the Maldives, and the situation is still complex after the early "no strings attached" reopening of private resort islands in July - resort staff were contaminated by arriving guests, which led to closures.
Local islands are still not open yet because of the fear of contaminating (often elderly) local population in a place with very little medical infrastructure.
Given the current situation, reopening means having a plan to handle new outbreaks linked to tourism, both for staff, tourists, and local population in contact with them, which isn't as straightforward as it might seem.