Whether a laptop’s USB-C port works as expected with charging a phone (reverse charging) usually comes down to whether both sides support a shared, open charging standard — and whether the specific combination is something the hardware was designed to allow, like laptop-to-phone reverse charging over USB-C.
Quick check
If it’s a standards-based USB-C or Qi connection, it’s almost always safe to try; the main risk with older proprietary or non-standard combinations (like extension cords rated below an EVSE’s draw) is underperformance or tripped breakers, not device damage.