Why it matters
For a business people visit or call, LocalBusiness markup with a name, an address and a phone number is how Google connects the page to its map listing and local results. A page that lists a phone number but does not say whose it is leaves that to guesswork.
How to fix it
Add a LocalBusiness JSON-LD block (or the closest subtype, such as Dentist or Plumber) with name, address as a PostalAddress, and telephone, matching your Google Business Profile exactly.