The ChargePoint app allows you to start and finish your charge remotely. I would also use an EV card on your dashboard to allow someone to call you if they would like you to end the session so they can use the charger.
Lately, I've been wondering what is the right protocol for me to use at public chargers. I may not always be right there to unplug once the car is fully charged and move it out of the way for someone else. And it's bugging me.