Does the Kymco People S 200 have an alternator?

To keep things clear for you i've listed 2 things for you to check.
1.
Your bike produces its own power. It consists of a stationary stator with a (pick-up/pulse) signal generator
The rotor/flywheel is mounted onto the keyed crankshaft, and secured with a nut.

This will be on the right side of the motor, you'll have to remove a cover to get to it.

I would have this tested with an ohm meter before you remove anything.
Pulse generator coil resistance should read 70-130 Ohms.

2.
Your battery produces power to start your enegine and run some lights. After some time your battery would go dead if not recharged. Your bike has a Voltage Regulator & Rectifier built into one unit, which some people call just a voltage regulator, and some people call it an alternator.

Your above mentioned stator produces an electrical current called AC power, which probably only runs the headlights, and the rest of that AC power is converted to DC power via the Alternator/Voltage Regulator, which runs the rest of the lights and horn, etc.

Your alternator should put out 13.5 - 15.5 Volts @ 5000 rpm.
Any other reading means your Alternator is bad. Too low undercharging Too high overcharging.

Test your alternator at the battery when the motor is running.

If you need to replace your alternator, it is located under the (nose)front plastics.
Usually a 4 prong plug and one bolt securing it to the frame.

If you are having trouble keeping your battery charged and you drive the bike regularly, there is a service bulletin out on the People S200 and S125 to upgrade the lighting coil and change the small running lights to dummy lights since they aren't really needed and they are just drawing unnecessary power from the system. See your KYMCO dealer if you are having this problem.