Expert for structured data / Knowledge Graph - Google (Wordpress page)

We needed expert support with questions about the structured data, the implementation and above all the rule-compliant implementation according to Google guidelines. - Google stars, when allowed for product, when for local company? - correct integration: how and on which pages allowed with which code (we already have a code snippet from a company that pulls together Google and Facebook ratings and displays them in the SERPs)? - Why do other companies appear for certain keywords in knowledge graph / panel and no local search pack is offered by identical offers? Why is not Maps and Local Search shown for some keywords? - How to solve it and how can I improve my result? - Suggestions for improvement and analysis, please. - Advice on whether we need to continue using the company's code snippet (costly per month) or if we can still use a plugin or our code. You will earn the complete price, if all 6 points are answered in a way, that will improve all. If something is missing, is split into 6 parts multiplied with these parts which are answered. You will have the chance to get a follow job to implement all. More details in chat. To see, that you have all points read, write as beginning sentence: "I'm Google Structured data Expert" Best M.