Bad news, the rapid antigen test is still positive. But I am apparently still allowed to go outside because I have the negative PCR test and finished the quarantine period.
Looks like the theory is it's most contagious from a few days before symptoms develop to a few days after, so I'm significantly less contagious now. Plus of course still masking. Anyway, will probably spend the rest of the day inside the hotel room anyway.
So I guess that means it's too early to book a flight out of here still. I need a negative test to get the boarding pass for the flight, and the PCR tests take ~12-24 hours to come back, so it will have to be an antigen test. At least now I can go outside to do the rapid antigen test every day now.