Giants in-game AI hired workers and steering assist are "nice" in the beginning but soon you grow tired of their short comings, FS25 Enhanced Vehicle mod is great while waiting for old school guidanceSteering GPS mod from Wopster
Be warned though FS25 Enhanced Vehicle mod is quite illogical to figure out at first, I pride myself as a experienced computer user but man was I lost or what when trying this mod out the first time, the tracks/lanes made NO sense to me at all, heck they still don't as I'm typing this, but at least I managed to make my tractor to do automatic 180 degree turns in the end of the row at the headland.
Yes FS25 Enhanced Vehicle mod has automatic turn at the end of the field!
See more details and download from Github FS25_EnhancedVehicle.