In Western Europe, it’s quite common to see tenders for electric public transport bus lines or more generic tenders being won by firms offering a solution using electric buses (not necessarily on costs, but on pollution, noise levels, and environmental grounds)

I think electric vehicles are mainstream there, already. It wouldn’t surprise me if all further winning bids were fully electric.

For example, googling “public transport bus tenders electric” gives me

- https://www.sustainable-bus.com/news/de-lijn-tender-350-elec... (Belgium, 350 buses)

- https://www.sustainable-bus.com/news/tm-barcelona-tender-ele... (Barcelona, 210 buses)

- https://www.electrive.com/2020/11/23/amsterdams-gvb-to-procu... (Amsterdam, 142 buses)