I have many friends working at these companies. Do they have access to view all my account info if needed? For example, my google maps / search data or amazon account or Facebook activity?
Although technically you can, but all your lookups will get audited. You need to justify all the lookups that do not look normal.
Sounds very similar to the Google answer, except we also enforce through policy and checks that you cannot access data for people you know, even with a legitimate business need. It’s audited, but we also attempt to block it in advance. The policy is zero tolerance, even accidental, no matter what your job title. During onboarding you’re reminded multiple times that you’ll not only be fired instantly but now may face criminal charges due to various privacy laws.
Generally no. Metadata (is an account enterprise, is it internal, etc) associated with accounts may be accessible to teams specifically working on a service, but no one has access to core account data like search history, order history, financial data, etc.
No. There is an auth chain per service for customer data. (With auditing). It is highly unlikely you're friends can access any of it and impossible your friends can access all of it.