I read this a few weeks ago on Sterling Sky and thought it was pretty interesting.
"The exception to this rule would be businesses that operate separately in different states. Let’s say you own a photography company but you have photographers in different states that go visit customers. In this situation, you’d be allowed one listing per state. For California and Texas, you might be permitted more than 1 due to the states being so geographically large."
https://www.sterlingsky.ca/multiple-google-my-business-listings/
Hope this helps!
Thanks --
Chelsea