Background missing from hoo-progress?

[gabbsmo]

Describe the bug
There seem to be missing a background (or rails or track if you will) for the progress bar.

To Reproduce
Steps to reproduce the behavior

1. Go to Pattern Lab

Expected behavior
There should be a background, like in Fluent React.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: Windows 10
• Browser: Edge
• Version: 124

Additional context
My workaround:

.hoo-progress {
    background: var(--bodyDivider);
}