If India (or any other country for that matter) would be in an armed conflict with the US, they would probably also consider banning various US controlled services.
I'd guess that double-standards are inevitable and desired when there is an armed conflict between nations.
If Indian government sees no harm in US apps whilst banning Chinese apps, this is the definition of diplomatic pressure. Asymmetry is the tool used to apply this pressure.
Your point is valid - we have no way to know Facebook algorithms and it is a blackbox, but this isn't supposed to be a symmetric comparison for aforementioned reasons.