Introducing "Request sign-off" - an approval flow that requires no set up

You really have put the cart before the horse by implementing functionality like this before providing any way to manage it.  I can't have users going off and running flows you have arbitrarily created and pushed out to my lists without giving me any control.  This whole flow thing is half-baked unless you have an IT staff that can devote time to keep it under control.  And I don't have any IT staff.  For the most part Flow is creating more problems than it is solving simply because the rollout is not being managed well by Microsoft.