What Apple supports
There is no supported Apple path to pair Apple Watch to Android for full Apple Health integration the way iPhone users get. Unofficial bridges exist but are inconsistent and can break with OS updates—HeyOakley does not promise those setups.
What Android users should do instead
Use a supported Google or Wear OS watch with Health Connect on Android. The supported HeyOakley Android path is Google / Wear OS watch → Health Connect → HeyOakley Android app. Apple Watch with Android is not supported.