You have the diesel?
Did you leave it in when you took your truck in? They probably reflashed the ECM and now your BDX is bricked. You will need to send to SCT/dealer for them to reset it. When Ford flashes the ECM with IDS, you must always remove the tune/programmer, and reinstall afterwards.
2018 Ford F-150 King Ranch 3.0L Power Stroke 4x4 | Icon 2.5 Front & 2.0 Rear, Toyo AT II 295/60R20, 3" ProComp Rear Block, S&B Dry CAI, LineX & BakFlip MX4, BuiltRight Seat Release | ForScan Mods: Disable Double Honk, 2x Panic, DPF Full %, Digital Temps Above Gauges, A.S.S Disabled