Regarding public bus, many states are currently testing electric buses. I have seen 2-3 in my city, though recent reports indicate the state run transport company is not that happy with the buses since they don't make enough profit or due to charging issues.
This article has a list of all the states that are soing trial runs along with the bus manufacturer's name:
https://www.news18.com/news/auto/modi-governments-big-electr...
Centre seeks proposals for 5,000 electric buses: https://m.economictimes.com/industry/auto/auto-news/centre-s...
BMTC (Bengaluru) working on plan to buy 300 electric buses: https://m.economictimes.com/industry/transportation/roadways...
>After Goa and Delhi, Kerala government has joined the race to dip from Centre’s `4,500-crore FAME-2 ( Faster Adoption & Manufacturing of Electric Vehicles) subsidy pool. The state’s public transport entity KSRTC has floated tenders to lease 1,500 electric buses for 10 years.
https://www.financialexpress.com/industry/kerala-floats-e-bu...