Oppo Watch Faq page 41

1. On your watch, open the Google Pay app.
2. Scroll to the card you want to remove and then tap it.
3. From the bottom, swipe up on More.
4. Tap "Remove".
6.2.5 Why is my card automatically
removed?
For your security, cards added to Google Pay on your watch are
deleted when your screen lock is removed. To re-add your card,
open "Google Pay" on your watch, add a screen lock, and then
add your card again.
6.2.6 Watch says "Can't check accounts"
when I open the Google Pay app.
1. To fix this error, update the Google Pay app.
2. On your watch, open the Play Store app.
3. Swipe down from the top and tap My Apps.
4. Scroll down the page and tap "Google Pay".
5. Tap "Update".
6. Re-open the Google Pay app.