I just activated Apple iOS Bedtime feature and Apple Sleep feature for my iPhone and Apple Watch.
But you may noticed one thing once your Sleep time starts iPhone stops ringing for incoming calls.
So here is how to disable silent incoming call feature…
Step 01: Just go to you settings app on your iPhone
Step 02: Navigate to Settings > Do Not Disturb > Phone > Allow Calls From > Tap on Everyone or All Contacts
In Step 02 you can choose your Favourite Contact list or Groups > All Contacts (This will enable notification for all calls from people present in your address book)
Hope it helps,
Thanks & Regards