No, some laptops with type-C inputs on both sides only support charging on one side (typically marked with a power icon), because they don't want to route power input to both sides of the laptop. It adds a bit of cost and complexity.
Higher-end laptops either support it on all ports, or just put ports on one side of the laptop.
Higher-end laptops either support it on all ports, or just put ports on one side of the laptop.