Reciprocity is key. Google and Facebook and most Western web services are blocked in China. If that is the case, then there should be no complaint with blocking Bytedance/other Chinese apps in the West.
Yes. Plenty of Teslas on the street in China but no Chinese cars on the street in the US. Lets see what the next chapter is; as you said reciprocity is key ...
If you want true reciprocity there, China would either need to stop subsidizing their carmakers, or the US would need to add heavy tariffs to their cars to level the playing field.