Is there no Contact "favorites" category for non-cellular iPads? (for configuring Do Not Disturb)

I was trying to configure "Do Not Disturb" on my iPad Air 2 with iPadOS 13.3 after a spam FaceTime call rang at 4:30 a.m.

On my iPhone, also with iOS 13.3, one of the "Do Not Disturb" options is "Allow calls from Favorites." However, on the iPad, the only options are "Allow calls from Everyone," "Allow calls from no one," and "Allow calls from all Contacts."

I thought that perhaps the "Favorites" option was missing from Do Not Disturb because I hadn't created any "Favorites" for the iPad contacts, but when I looked, I found that there isn't any "Add to favorites" option in the Contacts app, and because this iPad is wi-fi only, there's no Phone app. And there's no "Favorites" option in the FaceTime app.

So, is there no way to create a "Favorites" list on a non-cellular equipped iPad so I can create an exception in "Do Not Disturb"?