If you check out Ford accessories, you'll find that the Ford Perimeter Plus Vehicle Security System will add the ability to use your existing fob for remote start. It's $215 for parts and $50 to install, according to the website.
While looking at accessories on the Ford website, it said that remote start could be activated on my 2022 Big Bend without adding the convenience package. The website stated that remote start could be activated if the active security package was installed. Has anyone done this?