[2] Due to non-compliance to doping regulations, the World Anti-Doping Agency (WADA) banned Indonesia and Thailand from using their national flags in competitions, except during the Olympics.

[5] Out of the 47 AFC member associations, a total of 42 teams entered the competition.

The final tournament hosts Uzbekistan decided to participate in qualification.

On 29 July, North Korea withdrew from the competition due to safety concerns related to the COVID-19 pandemic.

In group G, after the withdrawal of Brunei and China PR, the two teams left (Australia and Indonesia) played each other twice.