perRegion labels do not display in the labeling interface

**Describe the bug**
When using the Taxonomy or Choices tag with `perRegion="true"`, the value the selected label is never displayed in the Label Studio interface. Our annotators would like to see the labels they have chosen for all regions in the image before submitting. I can see them in the data exported, just not in the UI.

**To Reproduce**
Use the following labeling template:

```xml

```

**Expected behavior**
I would expect these might show up under "Selection Details" in the sidebar.

**Screenshots**

**Environment (please complete the following information):**
- OS: Ubuntu 22.04
- Label Studio Version: 1.8.2

@hlomzik am I missing something obvious?