A missing update button can be a temporary display issue with the Google Play Store.
- Log out of all Google accounts in the Google Play Store application.
- Clear the cache for the Google Play Store app via your device's settings.
- Log back into your Google account and check for the update button.
- If the issue continues, try restarting your device after logging out and before logging back in.
If the problem persists after trying these steps, please contact us for further assistance.