I had both a native Openhab (via openhabian) on a RPi3 and a ZWay installation on a separate RPi3 via a Razberry card and a ZWay binding on the Openhab installation to “pull” the ZWay config into Openhab.
configuring the zway items using the native interface was a PITA, but it worked once I “got the zen”.
the OH core - zway interface worked reasonably well for several months, until one day it did not.
so far I have been able to salvage the zway-controller-paired devices into my main OH-z-stick controller without undo hassle.
Yes re the openhabian RPi using a USB ZWave controller. I do not personally know if OH2/openhabian natively supports the Razberry module. AFAIR some of the obscure openhabian-config options somewhat imply that, but I do not know personally. The option (35 in my version of openhabian-config) says: “Prepare serial ports for peripherals like Razberry, SCC, Pine64 ZWave, …” but I did not test that.