Hi - I don't exactly understand your question, but it's been a couple of days since you posted, so here is a first attempt to help!
Assuming Android, AFAIK if you have generated sqlite, e.g. mymap.sqlitedb you can place such files directly in OsmAnd's "tiles" folder - they don't need to be in subdirectories (which are needed for directory hierarchies of image files (*.png.tile or *.jpg.tile) that haven't been packed into sqlite).
You need to do a full restart of OsmAnd before it sees new additions (force-stop or swipe away from the recent apps list).
Speaking vaguely from random experiences, I found that that previously you had to choose a new addition as a "Map source" before it would show as a possible overlay or underlay. But in the latest version(s) this seems to have been fixed.
I may have completely misunderstood your question, but I hope this will get help started.