Is there a way to get notification just after PNP/iomanager finished enumerating all PCIE devices?

I would like to know if there is any reliable way to tell within Virtual Storport Miniport driver that all instances of other WDF drivers (loaded on storage PCIE devices) were just loaded.
It would be enough to know probably that PCIE enumeration was finished. I don’t want to have time-based solution as it seems not very reliable. I hope there is some better solution involving some notification mechanism or maybe just polling state of PNP/iomanager. Thank in advance for any advise.

There is not. What bigger problem are you trying to solve?

I have Virtual Storport Miniport driver that exposes to the OS devices controlled by WDF driver loaded directly on PCIE devices.
WDF driver registers PCIE devices to Virtual Storport Miniport driver. I would like to know how long I need to wait for all instances of WDF driver to
be enumerated and initialized by the PNP/iomanager?