How to enable activity sharing with Siri?
To enable activity sharing
1. Open the Bigin app on your iPhone.
2. Tap the
More 
icon at the bottom right of the screen.
3. Select
Settings 
.
Under "Manage Privacy", you can find the title "Privacy & Security".
4. Tap on Privacy & Security > Share Activities with Siri.
5. Tap the
toggle switch 
to enable activity sharing with Siri.

Note: Once you've enabled activity sharing, your Bigin app usage pattern is shared with Apple for improved Shortcuts and Widget suggestions.