Leaving India, rest all are willing to let China capture their territory or have accepted it.
India would have done well if we had fashioned a military coalition against China. We knew this issue since 60s. Its a shame we did nothing.
Perhaps you are not at all aware of US Policies Post 1991, ie at the end of Cold War
US was keen to Dis member Russia
Once and for All
and get India to Sign NPT , ie give up our Nuclear deterrent
So in order to Weaken India and Russia
US supported the Rise of China and Chinese economy
That is why US and China strongly opposed India' s Nuclear Tests and in 1999 , US attacked Serbia just to Humiliate Russia.
But 9 / 11 happened, and US spent TRILLIONS in Fighting so.called Radical Islam
While US was wasting its Treasury in Afghanistan and Iraq , China became a superpower and since 2010 it has entered into an Alliance with Russia
And thus having Secured its Western Flank it then started its Aggressive
Expansion in Asia and South China Sea
And today in 2021 , We have this QUAD and all this superficial coalitions