I'd argue such voters are significant because they will potentially impact the results of an election, but I'm not sure they're important in the sense of being

I'd argue such voters are significant because they will potentially impact the results of an election, but I'm not sure they're important in the sense of being worth any politician's time trying to address. There's no realistic way prices across the board are going to significant deflate (i.e. return to pre-pandemic levels) absent some economic catastrophe, especially when the people demanding it mostly seem to be over-estimating how much the price of things actually went up (like Ford Mustangs and chicken breasts). And it's definitely not something any elected official has the power to actually achieve. Increases in real spending power could help people generally concerned about purchasing power, but it doesn't help for the people you're describing who are anchored by past absolute dollar prices.