False. https://www.schengenvisainfo.com/news/travel-list-of-eu-countries-accepting-sinovac-vaccine-as-proof-of-immunity-for-entry/
It may not be accepted in the UK, but it is accepted in these countries. If you take away the bias and do some research, you find that apart from the Delta variant, it is effective. It is arguably not the best one, but it is not "garbage".
Austria
Cyprus
Finland
Greece
Iceland
The Netherlands
Spain
Sweden
Switzerland