Note: This method assumes that Apple Health and Walker Tracker are properly connected and that your steps were updating previously from Apple Health to Walker Tracker.
Do you have Apple Health connected to the Walker Tracker app and your steps aren't updating in the Walker Tracker app to their current values from the Apple Health app? If this happens, open your Walker Tracker app and swipe down and hold until you see a loading wheel saying "Allow 2-5 minutes for recent device data". This is a way to manually "force" your steps to update from Apple Health to Walker Tracker if the Walker Tracker app is lagging on updating automatically.
If your steps still aren't updating, please feel free to write us for help at firstname.lastname@example.org.