Since this is emerging as a same aadhaar like voluntary mandatory push, via PMO & Nitiayog involvement.
1. There is no success story for contract tracing via mobile will work.
2. Contact tracing is an experiment initiated by countries with high smartphone penetration
3. India's smartphone penetration is ~25% and max upto 35% (not counting people with multiple devices) .
Arogya setu later rebranded it to a government url pointing same Aws instance.
In short it was travel industry solutionism for post lockdown travel for smart phone users (which is a miniscule population.
Expect - more identity integrations
Protocol integrations for limited mobility