Are they connected to the Chinese government and used to exercise geopolitical power? Sure but everyone could have told you that already, because that's how China openly operates. There is basically no distinction between government and multinationals.
As far as the rest of the world cooperates with China's businesses I think everyone sees that facet as a trade-off for access to the largest market in the world.
So I don't agree with the take at the end of the article that finding a Huawei spy in Poland would be surprising or catastrophic for China. Grave cuts to commercial ties to China would probably send the economy spiralling, so nobody's going to do it, it's just going to be a tug-of-war for a long time to come.