Apple Watch SE

I found this post that might be worth a try,you will need Itune on a computer though;

How can I reset Achievements in iPhone Ac… - Apple Community

This is best done through itunes but not everyone has access to that

On your iPhone, open the Health app

Tap your profile picture in the health app iPhone.

Scroll down to the Privacy section

Under Privacy, tap Devices

Under the list of devices, you see all the sources for your health data. Each time you pair/unpair a

watch it shows up as a new source, even if it’s the same watch

Tap on a listed device and scroll to the bottom and choose the option to Delete All Data from

“Device Name”.

Tap Delete from the confirmation message to erase all data from this device

Repeat for all listed devices until you erase all your health data

When you delete all your health data from your iPhone, it resets your awards and badges on any

paired Apple Watch.

Then;

The most comprehensive way to remove any fitness, activity, or other health data from your Apple

Watch is to unpair your watch from your iPhone and then re-repair.

You’ll need to set it up as new.