Hi!
Indeed, there are 2 issues here:
- the “Graph overview” simply refused to show in some conditions
- the “Graph overview” menu item was not available in all circumstances
Both have been fixed (*), but alas just too late to make it into IDA 9.1 (that will be released soon.)
So, that will be for IDA 9.2. Feel free to register to our beta program (Hex-Rays Beta Program: Enrollment Now Open) if you haven’t already for a sneak peek!
(*) although regarding #2, it’s worth pointing out that even though the menu item will be enabled, the graph overview won’t show something relevant unless/until you’re playing with a graph view.