The EU is fairly consistent in its application of fines. I think what the poster is commenting on is that when Meta collects data it's "Meta is spying", but when ByteDance collects data it's "China is spying".
An American company following the laws does not get the scrutiny that another company working with a hostile government to eliminate your way of life does. Why would they? Are they somehow equal because they both can be downloaded in the social app category in the play store?
That's like asking why can I buy things from facebook marketplace but can't use my American credit card on vk.com?
Meta has had multiple rounds of €xxxM fines already from the EU.