Hi !
When you hit play can you see any meters moving ? For example in mixer view track concerned or stereo out 1 meters ? If you check VST Connections what do see as audio output device ?
Any channels muted ? You do have external (amplified) speakers connected to Steiny audio interface, right ?
Can you explain the whole HW setup you have. You have done something right if you can see recorded waveform and hear yourself via phones whilst playing.
If you start with a fresh project everything is defaulted to main stereo 1 output so there’s not much chance you have messed up something with the buses.
…and sorry for the last question…you have used earlier versions of Cubase before ? Meaning you are familiar with the concept ? If you are all I wrote above you can ignore.
…okay, one more thing to check…what is the word clock setting of your VST connections - internal or something else ? If you do not have any external clock source and you are trying to sync with something else than internal there will be no audio. Try switching between different options (internal first) and it might work…
cheers and good luck,
braunie