The 2018+ Fiat-Chrysler vehicles require additional steps to program. Please visit OBDGenie.com for gateway module locations: https://www.obdgenie.com/collections/chrysler-dodge-jeep-genies/products/chrysler-dodge-jeep-power-folding-mirror-package-programmer-c-pfm. The gateway module locations are clickable links for each model about halfway down the page.
Attached is a picture of what the gateway module looks like. The location differs in each vehicle. You will need to remove the plugs from the gateway module, replace the plugs into the module sent, program the vehicle using the OBDGenie and then remove the module and restore the gateway module to original configuration after programming is completed.