The Chinese yuan may not replace the dollar in the global financial market in the foreseeable future, but it will push it hard, that's for sure. Especially if we also take into account the digitized yuan. Even El Salvador, which recently adopted bitcoin as its national currency, started paying salaries in digitized yuan, although it is still being tested in China itself.
The Chinese economy is now developing faster than the US economy, and therefore the dollar will gradually give up its positions.