Hello,
Thanks for your post. To provide some context here, Strava has a publicly available API that hundreds of external developers use to integrate with Strava data.
I found some information about the CMF Watch Pro 2 on the Nothing Community here:
https://nothing.community/d/12851-cmf-watch-pro-2-strava-integration
From that post, it sounds like many are having a similar issue. I would encourage you to reach out to Nothing Support directly for assistance.
Potential Workaround: If your device can export or record activities in GPX, TCX, or FIT format, and these files contain actual workout data, you can upload the files here.
Let me know if you have further questions.