headingLevel on group components in summary2

### Description

The headingLevel set on groups is not reflected in the Summary 2 view. For example: I have a repeating group with a lot of content, resulting in many headings under each item in the repeating group. I set "headingLevel": 3 on groups inside the repeating group to make these subheadings smaller. However, this is not reflected in the Summary 2 view, where the headings remain the same size as before. This makes it difficult to see which content belongs to each element.

Is it possible to change the Summary 2 component so that the headingLevel set on a group is also reflected in the summary?

### Additional Information

_No response_

Start by locating the Summary 2 component and tracing how group headingLevel values are read when headings are rendered. Reproduce the issue with a repeating group whose nested groups use headingLevel 3, then verify that the Summary 2 headings reflect those levels.

Written by the indexing model from the issue text.