This sounds like a business idea to me. Rent small rooms in highly populated areas, make sure cell phone signals are blocked, let interviewed do their virtual interviews in this room on a provided computer. Sell it as "certified interview" to big tech.
Befor COVID, my AWS certification exam was in such a setting. It was an office space with a row of cubicles each containing a monitor, keyboard and mouse. You drop your belongings at the receptionist and walk in to take the test.
