Hey, GrooveToMove,
with BiaB's "Melodist" function there is at least already something quite similar available, to what you imagine.
You can access this via the menu item "Melody - Melodist Generate Melody and/or Chords".
You can use this tool to generate pure chordsheets without melody. If you select a very simple "recipe" for generation (e.g. the melodist "201 Slow Pop Children"), Band in a Box will generate very simple chord changes.
The button Melodist maker "...edit" allows you to further simplify the recipe of the song and the chords.
This is of course - unfortunately like so much in Band in a Box - not completely intuitive to use, but it works, so give it a try. The manual and help function explain the various options at least to some extent.
You will find three videos explaining the melodist fun ctions in pgmusics support area on this website.


Biab/RB latest build, German Language Pak, Win 10/64 Pro, 1 TB SSD, 32 GB RAM. Notation SW Finale, StaffPad, SmartsScore – Playing Double Bass, Guitar, Piano