None of the door hooks available worked well for me, so I made this simple one.

F3D file available, with modifiable parameters to suit your needs, door thickness, space at the top of the door, and the offset of the top hook can be easily changed.

It holds a suprising amount of weight (2 big jackets) even with the default 2mm top of door, but if you have more room, increase this for more strength.

Print on side as in 3MF, no supports, 10% infill works well and 0.20 or 0.24 layer height.