Where to find dbgsym package for recent azure linux-image kernel packages?

I'm trying to find the -dbgsym package for recent (e.g. 5.15+) linux-image -azure kernel packages.

They don't seem to exist in the ddebs.ubuntu.com repo for the more recent versions:
```
# apt-cache policy linux-image-5.15.0-1017-azure
linux-image-5.15.0-1017-azure:
  Installed: 5.15.0-1017.20~20.04.1
  Candidate: 5.15.0-1017.20~20.04.1
  Version table:
 *** 5.15.0-1017.20~20.04.1 500
        500 http://azure.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
        500 http://azure.archive.ubuntu.com/ubuntu focal-security/main amd64 Packages
# apt-cache policy linux-image-5.15.0-1017-azure-dbgsymN: Unable to locate package linux-image-5.15.0-1017-azure-dbgsym
N: Couldn't find any package by glob 'linux-image-5.15.0-1017-azure-dbgsym'
N: Couldn't find any package by regex 'linux-image-5.15.0-1017-azure-dbgsym'
```

On the other hand, they appear to exist for older versions (e.g. 5.4):
```
# apt-cache search dbgsym | grep ^linux-image- | grep azure | grep -v unsigned
linux-image-5.4.0-1010-azure-dbgsym - Signed kernel image azure
# (fin)
# apt-cache policy linux-image-5.4.0-1010-azure-dbgsym | grep ddebs
500 http://ddebs.ubuntu.com focal/main amd64 Packages
```

Thanks!