Hello 4day80,
Thanks for that info and for choosing the Apple Support Communities. If we understand correctly, you are unable to receive phone calls when Focus is enabled on iPhone, as they go to voicemail. This sounds like expected behavior, but you can adjust this for specific people, or the Phone app:
"Allow or silence notifications from specific people during a Focus
1. Go to Settings
> Focus, then choose a Focus—for example, Do Not Disturb, Personal, Sleep, or Work.
2. Tap People (or tap Choose People), then do one of the following:
* Allow specific people: Tap Allow Notifications From, tap
, then select from your contacts.
* You can also turn on options to allow calls from certain groups of people and allow repeated calls (two or more calls from the same person within 3 minutes).
* Silence specific people: Tap Silence Notifications From, tap
, then select from your contacts.
* You can also turn on Allow Calls From Silenced People.
Note: Regardless of your Focus settings, you can allow calls from your emergency contacts to come through. See Allow calls from emergency contacts when notifications are silenced, below.
Allow or silence notifications from specific apps during a Focus
1. Go to Settings
> Focus, then choose a Focus—for example, Do Not Disturb, Personal, Sleep, or Work.
2. Tap Apps (or tap Choose Apps), then do one of the following:
* Allow specific apps: Tap Allow Notifications From, tap
, then select apps.
* Silence specific apps: Tap Silence Notifications From, tap
, then select apps.
5. Note: You can allow or silence notifications from specific web apps you’ve added to your Home Screen. (See Receive Web Push notifications from web apps.)
You can also turn on Time Sensitive Notifications, which allows all apps to send time-sensitive notifications immediately."
And that info is from this Apple resource: Allow or silence notifications for a Focus on iPhone - Apple Support
Cheers!