Mine was a 2017, but I received instructions to do the eight cycles, which did not work. I then found the older 4 cycles directions which did work. Once you get your keypad, please let us know which set of directions worked for you.Have you actually done it that way on a 2018?
According to the manual the 2018 takes 8 cycles of they key.
I haven't tried it but will soon- I retained the keys/remotes from my totalled 2015.
Once the insurance mess is done I will attempt to add those 2 remotes to the 2 I already have.
Then I'll saw the key blades off since they won't work in the new van.