This chart tells you why the world needs china more than the US.

The world bank had stated recently that China contributed 38.6% per se to world economic growth compared to 25.7% by G7.

The US only contributed 18.6% despite being the largest economy in the world? Why?

This is because the US has been adopting coercive economic policies which are detrimental to world growth.  The recent example was the US chips act which prevented western chips companies from dealing with China.

As the US continues to isolate itself, China will continue to boost worldwide economic growth and make more countries dependent on China.