What I figured but was generally curious what their "corporate" answer would be. I personally don't buy anything that requires a rebate as I find it a shady practice (I worked at Best Buy during the rebate days and too many companies relied on your 1/2 point).
It may be plug n play, some 21 models have the 4th pin on the right side if not its a simple harness. You will still need a Jscan/Tazer/Dealer to activate it however.
DIY Mopar LED Headlight Halo Harness | Jeep Gladiator Forum - JeepGladiatorForum.com
Second this, thankfully mine was one day old and amazon swapped it no issue as an update bricked it. So if you do want to update it, do it in Amazons return policy as the company wanted me to ship it to them in China on my dime.
I use the one below, it works well. Takes around 30s-1min to connect and once a month I have to unplug it and plug it back in. For the $75 I payed I'm happy with it.
https://www.amazon.com/gp/product/B08GLVW169/
And returned, doesnt make my point any less revelant. Seems to be the norm with them, let the customers beta test, back up lights, tail light, burned heated LED lights :(
You should start by refunding @HopSlammer money and anyone else that is tired of waiting for a fix reguardless of normal return policy. You are selling a defective product that community financed and are currently beta testing for Oracle.
What gets me is to this day their website advetises these as plug n play. They should either A) Stop selling these until they are plug and play like promised or B) There needs to be a very large warning you are going to need a programmer curently to make them function properly.
I know it doesnt help resolve your issue but I also switched and had no problem wih using Jscan. Does Jscan show the change ?Make sure your truck is on the Run position when you make he change.