Yes, you can.
Let's say, you already have a resource with shared price options.
For example, a small cafe-bar, which has 4 tables.
Now create another price option. Click on +.
Enter Name e.g. "Whole restaurant", select an Exclusive type, specify the price, and enter a description if required.
Now there are 5 price options available for booking.
The configuration will look like this:
If you want to add a description for the Shared radio button, go to the Text tab in the widget settings.
Add a translation with key RESERVATION__SHARED_DESCRIPTION.
It looks like this on the widget:
Check the result on the widget: