There is a term for that, called profit margin. And profit margins have not materially increased.

https://www.macrotrends.net/stocks/charts/KR/kroger/profit-m...

https://www.macrotrends.net/stocks/charts/ACI/albertsons/pro...

Obviously, a 3% profit margin after a year of inflation is going to be nominally higher than a 3% profit margin before the year of inflation.

Hence any whining about nominal increases in profit is innumeracy, or clickbait, especially for businesses that play in the sub 5% profit margin ranges.

How low do people think grocery store profit margins should go? Have they tried successfully operating a business at 3% profit margin?