While the world basically opened everything they are still pretty close.
Source: https://www.formulapassion.it/motorsport/formula-1/gp-cina-cancellazione-calendario-2023-638344.html
It is their decision,we as F1 fans do not care much and especially us in Europe because we have to wake up really early on a Sunday to follow the races in Asia.We have a lot of other tracks and I am especially looking forward to what I predict to be the best race ever of F1,the Las Vegas GP of 2023 in the capital of gambling of the world.
There are a lot of other countries who are eager to continue and be a part of FIA,as far as I heard even Albania is building a track called "Automotopark" based on standards of FIA and built with their collaboration.Of course it is in an early stages but this to show that even not very well developed countries would love to be part of the racing calendar.