Hi PeteHumble,
First, my pleasure to assist you.
As per your description, please based on my test result and search, it seems there is no option to Reset Microsoft Sway Analytics e.g., Total views, Average time spent, Average completion etc because after Sways have been viewed, analytics for these Sways will be shown and cannot be reset.
Regarding to your concern, to improve the Sway view and this type of change has come up, you brought a brilliant point. We do understand your feeling that it would be very convenient if there an option in Sway to Reset Microsoft Sway Analytics. As we listen to all feedback and consider them for additional feature/future versions of our products, and we requested you (first my humbly please don’t mind) send/provide feedback via Sway app. Your feedback helps us know which features are most important to you.
We can expect this feature to be used in the future in Microsoft Sway.
I appreciate your understanding and stay safe!!
Best regards
Waqas Muhammad