While I don't know about the "Best Places to work" report... You can apply a filter of "Job Function" and get retail reviews from the same company page as engineering reviews. Thus, I would suspect it is "no, there is no separation of different job functions in the report".

https://www.glassdoor.com/Reviews/Apple-Retail-and-Food-Serv...

https://www.glassdoor.com/Reviews/Apple-Engineering-Reviews-...

You'll also find that FedEx Services (Best places to work #31) is different company than FedEx Ground (note the different revenue and number of reviews for the company).

https://www.glassdoor.com/Overview/Working-at-FedEx-Services...

https://www.glassdoor.com/Overview/Working-at-FedEx-Ground-E...