Yes, my house has 200 amp service.
I already have two slim breakers for added lighting circuits. The electrician said they may be OK for lighting circuit, but not for a 240V car charger circuit. He recommended against using slim lines to further extend the breaker panel.
The dryer line is 240V with a 30A breaker. According to the electrician, code prevents me from selling my house with that 240V dryer outlet disabled.
The charger line will be 240V with 50A or 60A, not sure right now. It will use Romex rated for 60A. The plan is to run the 240V line from the basement to the detached 2-car garage. Inside the garage will be a smaller sub-panel capable of supplying two EV chargers. At present, I will get one wall charger with a 23' long cable to reach the car. The sub-panel will make it easy to add a 2nd charger in the future.
All EVs can recharge with 120V. But they are very slow (days) to fully recharge an EV. My car is said to be capable of a full recharge in ~8 hours, at home with a 240V Level 2 charger.
If anyone else wants to know more about EV wall chargers, I found these links were useful:
Cheaper chargers, for ~$400, have no software to select different amperage, or to select a time frame to begin & end charging, allowing lower electricity rates.
I chose the ChargePoint charger. Amazon has it for $919. My Volvo dealer gave me a link
to order it directly from ChargePoint for $750. It allows the user to select the amperage from 16 to 50A, making that variable easy to deal with. It may be overkill, but at this point, I don't really know what features I'll need, until I've done it a few times. In the long run, extra flexibility never hurts.