https://store.canon.ch/canon-ifc-400pcu-usb-kabel/9370A001/ Canon's website also states that it is only for transferring files / photos etc.

Yes, this data cable is also compatible with the CANON EOS 100D.

I think so, I use it for the 5D, but still use a rubber band to secure the cable to the camera.

Yes, it is listed as a compatible accessory on the Canon website. https://de.canon.ch/cameras/eos-2000d/

No, according to our information, unfortunately it is not possible.

Le câble juste pour la Powershot G5 X est le modèle IFC-600PCU: Canon Canon IFC-600PCU Interface Cable