Whether your scale was set up via Wi-Fi or Bluetooth, your data is automatically synced within a few minutes after you step down from it. Your data is then immediately accessible in the Withings App.
https://support.withings.com/hc/en-us/sections/6212668113809-Wireless-Scale
https://support.withings.com/hc/en-us/sections/200335697-Tutorials
