I too was looking for a 10 ft cord, but it seems the longest they currently make is 6ft. Will that change? Maybe.

I ordered this one. You asked what to look for. Any cable that states it is rated for 5 Amps and it is IF-certified will fit the bill.

I use this strictly with my charger and the OEM cable to connect to PC.

lCable Matters USB-IF Certified USB C to USB C Cable 100W Power Delivery in Black 6.6 Feet (USB 2.0 Speed, No Video Support) https://www.amazon.com/dp/B0756QGTVQ/ref=cm_sw_r_cp_apa_i_F8SFDbBB7J1TA