UI displays 'No SBOM' for multi-architecture images despite SBOM availability

[Ankurk99]

Description
We are encountering an issue with the display of SBOMs for multi-architecture images (v2.12.1). When generating SBOMs for images that support multiple architectures, the UI incorrectly displays a "No SBOM" message. However, when the artifact is clicked, the corresponding SBOMs for each architecture are visible.

This behavior can be misleading to users, as it suggests that no SBOM is available for the image, when in fact there are SBOMs for each supported architecture.

Issue
Repository showing "No SBOM"

Expected Behavior
The UI should display a more accurate message indicating that the SBOMs are available for specific architectures, rather than displaying "No SBOM" when SBOMs are indeed present.

[stonezdj]

We can keep this column empty for an image index. does it make sense?

[Ankurk99]

We can keep this column empty for an image index. does it make sense?

Yes, it would be better that way.

[bupd]

Opened a PR fixing this issue. #21459

Thanks