There is one area of inflation where you can specifically blame Biden, and that is energy. His initial stance on domestic oil and gas where he basically wanted to shut it down no doubt caused prices to rise in the markets. That stance changed over time I believe, but the damage was already done. Of course, supply and demand after Covid restrictions subsided caused prices to rise, too.
I think Presidents can do very little to control inflation, but they can make matters much, much worse. Here's how.
1) Increasing government spending, blowing out budgets, causing currency devaluation
2) Shutting down production creating artificial scarcity, such as oil and gas production
3) Imposing tariffs on certain goods and services, passing increased costs to consumers (which is why trump is going to really fuck his dumb cultists)
Since Presidents can't really control supply and demand forces overall, along with meteorological impacts (50% of commodities have some dependency on the weather, such as grain prices), you can't just point to someone and say HE DID IT.