/e/OS builds are expected to have been running Bliss 3 for some time now. On my a15 I find
Version 3.1.2
foundation.e.blisslauncher
From Settings > Apps > Bliss Launcher.
Bliss 3 shows in active development in the repositories e / os / BlissLauncher3 · GitLab.
However as you mention the possibility of finding an inappropriate update in App Lounge on FP6 there seems a reported not yet fully resolved anomaly here Signature of the Calendar app does not match which may (or may not) have some of the same root cause.
You might find it appropriate to join that thread if you see, from the questions currently being asked, the connection with your issue.