What I think is the country allowed to visit will be updated once the borders open. They may start with UK , US, Singapore and extend to other countries with lower risk. Most Asian countries are struggling as their vaccination rates are low as people don’t trust the Chinese vaccine. But in 2022 all countries who rely on tourism will find a way to open their borders like Thailand has the sandbox scheme. This allows traveller to come into Phuket and have to spend 7 days in approved hotel. It’s not a quarantine and one is allowed to go out in Phuket. After 7 days one can go to other parts of Thailand.
https://www.thaiembassy.com/travel-t...t-sandbox-plan