Russia only provides 7% of the oil to the US according to https://www.factcheck.org/2022/03/examining-u-s-energy-indep...,
and Biden has held up fracking leases according to https://www.wsj.com/articles/joe-biden-suddenly-loves-fracke..., and inflation has started long before the Ukraine war (https://www.zerohedge.com/personal-finance/extraordinary-us-...) so yeah the Biden administration bears some responsibility.