Oxygen Updater is an open-source app supported by ads & donations, with 2.5M+ downloads on Google Play Store: https://play.google.com/store/apps/details?id=com.arjanvlek.oxygenupdater. It lets you skip staged rollout queues and update your OnePlus device ASAP.
Note: ads can be removed by purchasing the ad-free unlock in the app’s settings. It’s a third-party app, not an official OnePlus application.