Does the app reviewer do a thorough check of what services are available on your website?

My understanding is that if you offer a service on your website to individual consumers, you must offer the same service at the same price on your app but via IAP. Is this correct? Does that mean the reviewer has to do a thorough check of your website?

But then how do they check this? What if I remove all purchasable services for individuals on my website, then at a future date decide I want to reinstate those services on my website?