firebase - Cloud Firestore: How is read calculated?

Question

In Cloud Firestore we are charged for read/write/delete operations. Perhaps this is obvious for some but I could not find anywhere what is considered read. If I have a collection of 10 records and I fetch them all in form of a list, does it count as 10 reads or 1 (since I read only once from the database)?

Answer 1

Waitting for answers