Every company is a tech company, if you want to be broad in your definition, they have to use tech to compete .

Actions on Chinese EV cars are either being seriously considered or already in effect in most major car markets.

All phones have been always more or less Chinese made forever including Apple, even Chinese badging is how it been for low/mid range for 10 years now, maybe Samsung does some local manufacturing in SK but no one else major does.

Budget phones or budget EVs with razor thin margins is not big tech and no DoJ action to break up Google is going to affect the way they are becoming Chinese or already are .

There is reason TikTok is the most valuable Chinese company and not a phone company, big tech have big margins and strong market effect on their own and not as a group (I.e. it would be hard to beat Chinese companies in a space , but no individual one (say byd) is irreplaceable by another Chinese company