In this scenario, are you permitted to overtake the electric scooter?

Yes. The photo shows the B-25 'no overtaking' sign and an electric scooter riding on the carriageway. Sign B-25 prohibits overtaking multi-track motor vehicles, but does not cover single-track vehicles such as an electric scooter, a bicycle or a motorcycle. Overtaking the scooter is therefore allowed, keeping a side clearance of at least 1 m.