I'm a freelance web developer, my wife has a craft business that she runs part-time Sept thru May, full-time June thru August (she's a teacher). We work both businesses from home. We both have a GMB listing using the same address.
Mine is set up as a service area listing that hides the address. Her's is a regular listing that shows the address. We each have plenty of reviews. And as far as I can tell, two distinct businesses in Google's beady little eyes.
That said - there's a chance, at some point, Google could count both as the same listing and combine them which would be interesting. I'm not worried but for those who play it safe, it's probably better to have one business per address.