Same issue here that I posted about a few days ago: ASC Doesn't Generate DSYM file Others commenting are experiencing the same problem so doesn't seem like an isolated issue.
Purcy
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Like some others here my DSYM download link has now shown up as well. It took roughly 5-6 days to show up. I didn't upload a new build or change any configuration. The only thing I did was raise a support request a couple days ago. There is no activity on the request, so I can't confirm whether that is responsible for the link showing up, of if it was just a coincidence. So not really a proper solution or satisfying outcome as the cause and fix are still unknown. Would still like to see if anyone from Apple can chime in here and hopefully explain the issue in more detail and potential mitigations that can be taken.