Your lack of understanding of simple statistical models does not mean that "it could mean something". It doesn't. If you want to educate yourself, you can start here, this is a very introductory article, you can easily go deeper googling some terms found within:
https://www.scribbr.com/methodology/control-group/
What vaccine are you speaking of? The Moderna vaccine was test on 3 age groups, including a 56-69 and a 70+, and showed success:
https://www.thejakartapost.com/news...k-as-well-in-older-adults-in-early-study.html
The Sinovac vaccine is also being tested on a 60+ group:
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-020-04775-4
The Moderna vaccine can be stored at refrigerator temperature for 30 days, and only needs common freezer temperature (-20C) for 6 month storage. Indonesia is easily capable of this distribution in larger towns and cities, which are the most severely impacted by Covid anyway. It will take extra effort to reach the last 10% of the more isolated population, but it may simply not be necessary if there is high uptake in cities and towns.