1-Put the element on the page or in a repeating group

2- Put a start / end date with dynamic data

3- let an offset for start and end date .
Example : offset 1 for start will get back one more date before the start date. If -1 , will remove one date from the start date .
Same system for end date : 1 will give one more date after the end date , and -1 will remove one date from the end date
You can off course set to 0,1,2,3...etc

4- Choose, if you choose yes, to change the hour & the minute to save dates with the right time !

5-Choose interval day.
For exemple : 27 to 30 , with interval of two, you will get back 27 & 29 .

Try it on demo page :

https://demo-add-list-date-range.bubbleapps.io/version-test/list_date_flexible