Google Sheet that attempts to show all Legion stories from the beginning, also noting which issues appear here on DCU.
Click here to join the [Legion Fan Club], both a weekly reading and also monthly Watchalong Club:
In a nutshell, most issues since 1976 have been digitized. The era from 1958 to 1976 still has substantial gaps.
Maybe that will start getting filled in now that the Legion has their own series again, the first since things shut down for them in 2013, 6 long long years ago.
This list has over 840 entries btw…