Not sure how to say it more pronounced as I just did: the real power over HK lays of course in the north now.
Of course there is a long list of companies and individuals that got into the crossfire, in China as well as in Hong Kong. However, there is no sign nor reason I can think of that Beijing would be motivated to intervene regarding state support for a struggling local airline clearly caused by Covid restrictions.
Your reference to Jimmy Lai makes no sense to me, this was clearly about silencing a oppositional voice and his associated media enterprises. I see no association to Cathay whatsoever.