I'm unaware that any are restricted to VFR only.
Permit to Fly Aircraft are limited to VFR flight only according to the conditions of their permit to fly.
The reasons why the aircraft is limited to VFR will most probably be certification limitations.
If you are thinking of completing public transport operations at night in this aircraft your best approach is to contact the manufacturer and discuss the matter with them and having come up with a solution acceptable to the manufacturer, contact the relenavt authority.
There is little further advice anyone can give without knowing the country and the aircraft type.
Finally, ICAO leave it up to the relevant national authorities to decide how they will handle VFR flights at night. Thus there is no international standard.
Regards,
DFC