I’d like to see a more recent one, since it seems the pandemic spurred a lot of the price gouging. Our minimum wage has gone up $3 since 2019.

That information would definitely be interesting to see, but I wasn't able to find it. And for the purpose of comparing min wage to prices, pretty much any year before the pandemic will do, as the purpose is comparing min wage to prices, not how the pandemic gave the excuse to corps to fuck everybody.

Also, since there’s not a huge difference in Big Mac prices between states, I’m wondering if national chains are using the min wage increase in a few states to increase prices across the board, rather than just increasing prices in the states with high minimums.

I'd bet that's the case as well.