There are regular shopping Sundays in Germany.
To be sure, check the website of the location in question before visiting.
In addition, there is a Shopping Sundays section on this website under Calendar.
May 21, 2023
June 4, 2023
June 11, 2023
June 18, 2023
June 25, 2023
replenished every month!
For additions and updates:
https://www.verkaufsoffener-sonntag.com/bundesland/nordrhein-westfalen/
and pdf file below