Fitness data functions do not retrieve data when adding start and end dates that exceed the current day. This happens with all activity types and all data types. Usually this problem was solved by restarting the phone, but not anymore. I’m using Android 15 with Health Connect. I attach a screenshot with some code tests to show that the problem is only when the information of other day(s) is requested.
Just tried it, works for me.
Are all permissions still active?
yes, still active. all permissions. I have an OS update pending, I’ll see if that changes anything.
I updated the OS, and it has an update for Health Care, so I was excited, but it didn’t fix anything. I tried uninstalling KWGT and reinstalling it from scratch, but nothing 
Maybe try deleting and re-applying the permissions?
Also, make sure there is step data available to import in the first place. To check, go to your device’s Settings > Health Connect > Data and Access > Steps.