The product works on the Ioniq 5 but you do have to plug it in with the tesla charger and wait 30 sec for it to fail and then turn on the car for it to start charging.
Very high quality and solid. The heft of this adapter tells you it's well made and both sides of the adapter fit perfectly. Charging was flawless and the locks were compatible with my IONIQ5 system.
Stopped by a Tesla destination charger at a hotel, plugged in, started right up. Seemless install. Thanks for good product. This will give me peace of mind when I head out on new routes not knowing the quality of normal Level 2 J1772 charging network.