No, but many will have it accidentally.

2 bedroom apartments are the most common IIRC, and those usually have 1.5 or 2 bathrooms (a "public" and a "private" where a half bath is a shitter/sink no shower/bath).

3 bedrooms usually have 2 but sometimes 3 (a public - by public I mean the one the guests would use - a "master" or ensuite one INSIDE the biggest room, and sometimes a jack-and-jill between two other rooms).

I think this regulation is specific for subletting rooms, e.g., you can't force someone to share a bathroom with someone they don't share a bedroom with.