If you are currently experiencing issues with Apple Health, please check that your app is up to date, and try the troubleshooting in this article to make sure Apple Health and Withings App are correctly linked.
https://support.withings.com/hc/ja/sections/6216069138705-Withings-App-iOS
https://support.withings.com/hc/ja/sections/200501478-%E6%A9%9F%E8%83%BD