Update for tempo maps:
These will fit tracks from Biab Plugin to a Tempo Mapped session in Reaper (the plugin just needs fixing so when it's playing back the generated tracks in sync (before dragging into the DAW) it needs to sync play back to the DAW's tempo map).

right click Save Link/Target As
ReaTrak import chords from biab plugin.lua

ReaTrak set item bpm and fit to project tempo map.lua

Reaper > Actions > Show action list > ReaScript > Load > ReaTrak import chords from biab plugin.lua
after it has been unfolded, Saved and reloaded
Run > ReaTrak import chords from biab plugin.lua
do the same with ReaTrak set item bpm and fit to project tempo map.lua
File > Project settings > Project start measure > -1

To get the button panels install ReaTrak


https://youtu.be/WjLwSENYnso