Thank you for your help cscs. If I type now, e.g.,
prime-run inxi -G
it returns
Graphics: Device-1: Intel UHD Graphics 620 driver: i915 v: kernel
Device-2: NVIDIA GP108GLM [Quadro P500 Mobile] driver: nvidia v: 440.100
Device-3: Chicony Integrated Camera (1280x720@30) type: USB driver: uvcvideo
Display: x11 server: X.org 1.20.8 driver: modesetting,nvidia unloaded: nouveau resolution:
OpenGL: renderer: Quadro P500/PCIe/SSE2 v: 4.6.0 NVIDIA 440.100
which I guess makes a lot more sense. Thanks again!