I’d add that https://api.snapcraft.io and https://snapcraft.io (which hosts the docs among other things) appears to be part of the impacted Canonical infrastructure still impacted. Certain Flathub packages like Slack that use snap return errors that the snapcraft API isn’t reachable:
Error: While downloading https://api.snapcraft.io/api/v1/snaps/download/JUJH91Ved74jd4ZgJCpzMBtYbPOzTlsD_244.snap: While fetching https://api.snapcraft.io/api/v1/snaps/download/JUJH91Ved74jd4ZgJCpzMBtYbPOzTlsD_244.snap: [6] Could not resolve hostname
This means the impact isn’t just limited to Ubuntu, but extends to anything on Flathub or other package platsforms that utilize api.snapcraft.io for users, and development resources for maintainers