The problem isn't your listing. It's that nobody touches it.
Pamela had one review. One.
She started asking for them at the till, phone already in hand, while the client put her card away. She also messaged her regulars. In seven days she was at twenty.
Her salon hadn't changed. What changed was the moment she asked.
That's most of local SEO. There's no secret technique. There's doing it, and doing it every week.
Almost every business in Valencia has a listing. They created it, uploaded four photos, and there it sits.
March's reviews unanswered. Photos from opening day. Christmas opening hours still up. The category picked by whoever helped set it up, which isn't the one your customers type.
And someone three streets away pulls out their phone, types what you do, and gets a different result.