No. Planning approval is granted under legislation separate to that for building regulations. Broadly, Planning approval defines “what” you build. Building regulations approval defines “how”. You can’t build lawfully with just a planning approval.
So the Planning approval is about things like:- Access, appearance, landscape design, site layout, scale and massing. It may additionally be about protection of historically valuable (Listed) buildings. And about valuable and special parts of the environment. Such as Conservation Areas and Sites of Special Scientific Interest.
But building regulations is about technical things. Such as health & safety, practical amenity for users, and efficient, careful, use of resources. It is also about standards of components, materials and workmanship.