January 21, 2021, Biden signs EO to kill keystone pipeline, oil leases, and drilling. That was the beginning of inflation.
The problem with inflation (the Government and the FED have been lying about this for decades) is too much spending, printing of fiat currency, and stupid and short sighted policies. The two big culprits, imho, are the profligate spending/printing of dollars, and government policy with regard to energy. The shortage of energy with the concurrent rise in prices for everything else is a result of years of attacks on the fossil fuel industry. Capital Expenditures have been greatly reduced, and now we see the results. OPEC doesn’t have the spare capacity to bail us out anymore.