Looking into ways to chart health data on iPhone, there are some different options out there but many of them involve sharing personal data with a third-party. Then I realized Shortcuts could be used to gather this data and manipulate it locally - while staying entirely within the Apple ecosystem.
Link to Shortcut:
https://www.icloud.com/shortcuts/d8292a1afc9241d98e8acdefbcf9af4c
Share Or Open Step Data
Gets last week’s step data from the Health app and prompts to share as CSV or open in the Numbers app.
Can be easily modified to expose other Health data, time periods, and granularity.