Well if Sri Lanka sticks with the west they are finished.
There is no cause to get involved with Sri Lanka.
That area will be driven by India.
I think India would prefer if Sri Lanka joined up with China and Russia. Linking up with USA means it becomes a rubbish tip and no go zone as a place of continual conflict and disturbance.
Indians will in time have to avoid Sri Lanka as a failed state in decay due to USA interference