The answer
The Church of Alexandria considers the Shepherd of Hermas as spiritual literature but not a canonical book. We do not consider Hermas in the same regard as St. Clement or St. Ignatius because we do not have much substantial personal information about Hermas, but we know more about St. Clement and St. Ignatius, their lives, and legacy.This is a good resource on this topic: https://suscopts.org/wiki/The_Shepherd_of_Hermas.
Answered by His Eminence Metropolitan Youssef (opens in a new tab)