Help, does anyone know how to exit this screen without a power button? (8T)

Hey guys and girls,

My partner's Oneplus 8T has a broken power button, and while trying to get it to switch on, we encoutered that screen.

I would just LOVE to be able to confirm that "start" option, but it's just impossible to do so without a working power button 😭

Does anyone know how to exit that screen, so I can try to switch it on using another method please? That'd be amazing!