The most important thing about it: it never happened as portrayed in the cartoon.
The cartoon's insinuation that "the West" (symbolized by the EU) has silenced Özil for speaking out over the persecution of the Uighurs is fiction. The takeaway that it was the DFB that did so (not actually explicated, but implicated by the cartoon) is just as false. The cartoon mixes up several incidents and puts them together in a wrong way:
1. The reason Özil came under heavy criticism in Germany was that he and Gündogan were promoting Erdogan in a photo OP
in 2018, while Erdogan was doing an election campaign. A brief summary of events, the DFB's reaction, and the reasons why Özil subsequently quit the NT can be found on wikipedia
. I'd say a message supporting the Uighurs would be largely accepted and rather popular in Germany.
2. It was Arsenal who shunned Özil over his social media message about the persecution of the Uighurs. This happened 1,5 years after the events described above, which means displaying Özil in a Germany NT shirt doesn't make any sense. Arsenal was reported to have business interests in China:
Repercussions and censorship from Chinese state/media were reported
3. In his IG message
(I have to presume the translation is correct), Özil actually acknowledged the highlighting of China's treatment of the Uighurs "even in the Western media and states", but criticized the Muslim world for not doing the same. Yet the cartoon shows Özil being "silenced" by an "EU"-flagged hand, obviously standing for "the West".
This means: if the cartoon is aimed at the DFB, Özil would have to exclaim "Erdogan" there instead of "Uighurs". Doesn't really fly. If it's aimed at the pushback against Özil over his China/Uighurs message, it would have to be an "Arsenal" or "China" hand which silences him. Wouldn't really help delegimitising pro-LGBT protests in Qatar, as is the intention. So these incidents are recombined creatively to serve the purpose.
The cartoon uses alternative facts to push its talking point
inside the online discourse. Reverse image search says it has seen some spread on social media, although I can't be arsed to find out how much. But it has made its way into the Caf, and judging by its reception, its messaging has worked pretty well.