There are some vehicles that do. I think some NYC buses and the NJNG vehicles run on NG.
The key issues driving the current inflation, namely supply chain issues and a tight labor market, seem to still be around. As for rising energy prices, bad policies are still in place, so that might continue.
https://twitter.com/chigrl/status/1522212891063164928
It is still a work in progress.
https://twitter.com/chigrl/status/1522269608757149696