Hong Kong is collateral damage in Trump's new trade war with China(asia.nikkei.com)
asia.nikkei.com
Hong Kong is collateral damage in Trump's new trade war with China
https://asia.nikkei.com/Opinion/Hong-Kong-is-collateral-damage-in-Trump-s-new-trade-war-with-China
While China seems to think the Covid situation is an opportunity for it to increase influence, it's probably the opposite. The pandemic has shown China to be a single point of failure in the supply chain.
Trump is right about China, but everyone else in the West can't/won't agree as they're too afraid of missing out on Chinese investment funny money.
As for expelling foreigners from HK... why wouldn't they? They're already expelling foreigners from the mainland.