The physical iPhone is offline, unfortunately. Maintaining physical iOS devices at scale, and keeping them from dying, is tricky.
For testing iOS, right now we strongly recommend using the iOS simulator at one of the M1 locations instead of emulation. Any emulation otherwise uses Chrome under the hood, which is going to give you very different results.
You’ll still see some differences—the CPU of the iPhone 8 is a bit slower than what the iOS simulator is going to do, but at least you get the real Safari under the hood so you can check browser differences, etc.