When a business doesn't have an address on its GMB profile, we must add it as a virtual business however it is going to be a problem since many businesses don't have an address on their GMB profile - though they've registered with Google My Business it might have been due to lack of knowledge. It'll take some effort to add such businesses despite paying a fee for Premium.
It'll be good if the tool detects a lack of address and prompts whether adding it is fine - it saves a lot of time.