Calculated last 7 days using Dax but

Anonymous , Looking at your data, I doubt you have data for last 7 days based on today. Make sure data is there.

Also, you should use date table for any time intelligence function

Rolling 7  = CALCULATE(sum(Sales[Sales Amount]),DATESINPERIOD('Date'[Date],MAX('Date'[Date]),-7,Day))

Rolling 7  = CALCULATE(sum(Sales[Sales Amount]),DATESINPERIOD('Date'[Date],today(),-7,Day))

Why Time Intelligence Fails - Powerbi 5 Savior Steps for TI :https://youtu.be/OBf0rjpp5Hw
https://amitchandak.medium.com/power-bi-5-key-points-to-make-time-intelligence-successful-bd52912a5bd4
To get the best of the time intelligence function. Make sure you have a date calendar and it has been marked as the date in model view. Also, join it with the date column of your fact/s. Refer :radacad sqlbi My Video Series Appreciate your Kudos.