it still is probably. Never forget the empty store shelves during COVID were Biden's fault, too, even before the election. "This is Biden's America" shrieked the boomers as they filled three shopping carts with enough toilet paper to pass down to their grandchildren if they didn't have to light it on fire to stay warm later that winter in Texas.
That reminds me of when people show pictures of slums or empty shelves and claim that's the result of communism or socialism when it's literally the result of capitalism
Trump was in office, no one was blaming Biden for anything, yet. I remember some stupid memes with empty shelves and "this is what it will be like under the Democrats".
Anecdotally, I remember plenty of people blaming Biden for the United States' bungled response to COVID despite him not being president at the time. Ask people who was president in 2020 and a lot will mistakenly say Biden.