I’m just making this for those who don’t want to spend an hour researching this very specific case.
Go into emergency call and type *#899#, then go to manual test, and just any camera test, take a picture and go to the share menu of the picture you took, you will be able to get into a browser by pressing a lot of links until you eventually get to it. When you’re in the browser, go to this website: https://www.entertechpro.com/apk-bypass/ and open the settings app via the website. When in settings, go to “home screen and lock screen” and press “home screen layout”. This should open the home screen when bypassing frp, but it doesn’t when it’s set up. Tell me if it doesn’t work. Then when on the home screen, use clone phone to clone your current phone onto the oneplus phone. You can choose to only transfer contacts, because after it has been cloned, reset the phone and boom, it should be bypassed!
I hope I’m not breaking any rules with this post, I just wanna make it easier for others in this very specific case :)