Custom Merge queue implementation in Azure DevOps - Failed PR's scenario

[siva228666]

We are implementing a custom merge queue in Azure DevOps where multiple pull requests (PRs) are sequentially merged into a temporary merge queue branch. A single validation pipeline is then executed on this temporary branch before merging it into the target branch (for example, main or develop).
The challenge we are facing is that when the validation pipeline fails, there is no reliable or built‑in way to determine which specific PR (or PRs) caused the failure, once multiple PRs have already been merged together into the temporary branch.