I asked several schools in the virtual fair today. All of them said they haven't decided yet. I remember one school said that they would prefer to hold in-person interviews if the COVID gets under control.
Depending on each State it will be different. Some states with less number of Covid cases probably still will prefer in person interviews. I personally think in person interviews are much more beneficial as you get to see the school in person followed by dental students or residence and you can have a conversation with them in regard to the school & their curriculum