I have gotten it to work partially.
I can text and have 4g access but I am not able to make or receive calls. To get it to work to this point I had to get into the phone information section and select LTE only as my preferred network type.
I should be able to enable VoLTE and Wifi calling from this menu but both options are disabled and I am unable to make the change. I don't know if this is a verizon issue or a nokia issue though.
We do apologize for the inconvenience you are experiencing with your Nokia 9 device,
Save your breath,
I spent over 4 hours on the phone with Nokia. They cannot help and at the end pointed me back to Verizon. Their staff is just as confused and kept saying "it should work".