Hello ERIKA616.
Thank you for using Apple Support Communities. You can change your Do Not Disturb settings to allow calls from specific contacts to come through. The following resource has steps that you can follow on how to make those changes: Use Do Not Disturb on your iPhone, iPad, and iPod touch - Apple Support
1.) Go to Settings > Focus
2.) Tap on Do Not Disturb
3.) Under "Allowed Notifications" tap on People
4.) Tap the "Add.." button to add the contacts you wish to receive notifications/calls from
We hope this information is helpful. Cheers.