https://www.f150forum.com/f118/2019-f150-order-guide-423919/
Looks like an electronic E-Brake is the only mechanical change besides the shocks.
MECHANICAL
New/Changed
— 3.5L EcoBoost® engine (994) – opt. on XL, XLT, Lariat,
King Ranch and Platinum; 3.5L EcoBoost® High Output
engine (99G) – std on Limited and Raptor
— Engine Block Heater (41H) standard states are now
optional
— 36 Gallon Extended Range Fuel Tank – now standard on
Limited and Raptor (SuperCrew®)
— FOX Racing Shox™ now includes Live Valve Technology
– std on Raptor
— Trail Control™ replaces Hill Descent Control™/Off-Road
Mode on Raptor
Other: E-brake, Auto Highbeam, Stop-&-Go cruise.