Hello Veajauwe29
In Switzerland, anyone can access the platforms, even those who do not hold a ticket.
The inexistence of such a service is rather the result of high labour work cost, such a service would not be profitable.
CGS Porter Services is active at Geneva Airport only.
You might want to check options with the Geneva tourism office.
https://www.geneve.com/en
Geneva main station has ramps and escalators. If the travelers have baggages on wheels, they can easily move around.
Kind regards,
Roland