This isn't the case. People assume this is the case because only one side is reported for various reasons.
Just to be clear though: the Communist Party of China is not a massive fan of far-right parties, there are certain ideological barriers there.
Russia employed the former left-wing German Chancellor as part of their strategy making an invasion of Ukraine economically viable for them (it is worth pointing out that when right-wing politicians pointed this out, it was received as a crazy conspiracy theory..."liberal voters" distinguish themselves as people who believe themselves particularly unlikely to believe in "misinformation" whilst simultaneously believing in things that make no sense, most people who have a knowledge of politics are required to believe things that aren't true...if they were in touch with reality, they wouldn't vote).
To call Scholz left-wing is quite a stretch. But what can one expect of someone that believes that not voting is the natural consequence of "being in touch with reality".
My casual read is that the CCP can tolerate both the far left and right in the US, but only the far right is near the levers of power, and the far right is apt to leave them alone entirely(America first).