There is not much to a service. However the MOT needs to have a ramp and brake test rollers that are small enough for a Twizy.
Service is mostly:-
Check Brake Fluid
Inspect and adjust brake pads and disks
No Oil changes.
The rest are inspections carried out by MOT or day to checks. Bulbs Wipers, tyres and Washer fluid.
In fact one of the checks on the Renault list is Dust caps fitted to all wheels!