In late Sept Tesla upgraded GigaShanghai output to 22,000...

In late Sept Tesla upgraded GigaShanghai output to 22,000 vehicles per week(1.144m/year).
https://www.reuters.com/business/autos-transportation/tesla-completes-production-capacity-expansion-shanghai-plant-shanghai-govt-2022-09-19/

Tesla eased off expectations by saying it will run at 93% capacity.
https://www.reuters.com/business/autos-transportation/exclusive-tesla-keep-output-upgraded-shanghai-plant-below-maximum-sources-2022-09-27/
Either way 1,000,000+ units per year from Shanghai is pretty strong on the growth front. 2021 capacity at year end was 834,000. So have garnered a 20% production increase even with all this years issues.

Some journalists did speculate the covid lockdowns in China are peppering demand. This may well be the case recently but China has now lifted covid restrictions, so you could expect demand to rise again depending on covid & winter issues forthcoming.
https://www.investors.com/news/tesla-deliveries-from-china-plant-set-record-but-are-below-views/

Recently Doomberg reported reduction in worker shifts but this claim has been emphatically denied by Musk. Legacy media is torn up with Musk's freedom of speech recently so there is some blowback from major news & media corporations, so let's see if this news is true or just more fake media.
https://www.investors.com/news/tesla-stock-falters-on-latest-report-of-china-production-slow-down/