Phone screens are now virtual interviews?

Lately, I’ve noticed companies saying they want to schedule a phone screen but, it’s actually a full-fledged virtual interview on Teams. Why can’t we just go back to talking on the phone initially? I work FT and what I initially think is a quick 10-15 min call I can take on my lunch, turns into 30-45min sitting in my car awkwardly trying to not move too much for the background filter.