It's possible that your active subscription period has not reached the length of time necessary to obtain loyalty perks.
For further information, please review the text below.
■Your Current Active Subscription Period:
To see your current active subscription period, tap More about Feh Pass in the in-game Shop.
■ The Active Subscription Period Needed to Obtain Loyalty Perks:
Please check the text under the "Log-In Bonuses for Ongoing Subscriptions!" header on the following web page: https://fehpass.fire-emblem-heroes.com/en-US/system/#rewards.
If the above does not resolve your issue, please contact Customer Support via the Inquiries form at the bottom of the page.