1 ACCEPTED SOLUTION
GREAT question. I believe the table you want to query is sys_hub_sub_flow_instance
That table has both a SubFlow and Flow reference. By default the SubFlow reference isn't in the list view so you'll have to personalize.
A QUICK NOTE ON HOW I FIGURED THIS OUT
Huge shout out to James Neale, creator of Xplore. One of the best ServiceNow dev tools out there.
I created a playlist for how to use Xplore. But the specific feature I used was Table Hierarchy, explained in this video.
