Let say weekly analysis to be presented with week format as weekstart (date) &'-'& weekend (date ) i.e. 1/1/2022 - 1/7/2022 , 1/8/2022 - 1/14/2022 , 1/15/2022 - 1/21/2022 ... in a filter and that should display the data Accordingly.
In a chart show product wise | current week sales | Previous week Sales .
Note:- week format should be as weekstart& weekend as shown below