It was standard last year but I read it's now an option with the Ultimate pkg. Here is the excerpt:
Feature Availability: The 2024 Super Duty offers a range of new features across different trim levels. Onboard Scales with Smart Hitch, previously exclusive to higher trims, can now be added as an option on the XL and XLT models. The Tow Technology Package is no longer a standalone package but has been integrated into various trims. Notably, the Lariat Ultimate, King Ranch, Platinum, and Limited trims come equipped with Pro Trailer Backup Assist, Trailer Reverse Guidance, and Pro Trailer Hitch Assist. The XLT Premium, Lariat, King Ranch, Platinum, and Limited trims now include Connected Navigation with one year of connected services.
I like it because I could "dial" the backup straight and just give it gas with no worries on my long driveway and some boat ramps, otherwise I do it the old fashioned way!