I have also same kind of question.
My current Cubase version is 9.5
I have keyboard and Yamaha MD-BT01 bluetooth MIDI device connected to the keyboard.
I see the bluetooth MIDI in MIDIBerry and I can play using Microsoft GS Wavetable Synth
But I dont see MD-BT01 in Cubase input/output.
For me it works more or less ok (but with a.m. latency) if I follow steps one by one
a) Start LoopMIDI (Run as Administrator)
b) Start MIDIberry
c) Start Cubase
If I do different siquence it may bring me delays with couple seconds (Terrible)
Some additional
Now researching about if it is possible to reduce latency. I think delay happens because of chain MIDI (MD BT-01) → MIDIberry → LoopMIDI → Cubase
Somewhere there are delays. I suspect in MIDIberry → LoopMIDI part. Probably because of driver.
MD BT-01 has very good reputation about latency so I am looking about update something after it.
I’m also having problems with Korg Microkeys and Cubase/Dorico. Win 10 recognizes the Korg and it works in MIDIberry, but not in dorico/cubase. Neither Bluetooth nor usb-cable.