Would fat transfer help boney indented forehead? (Photo)

Yes, fat to the forehead can help smooth out the bone while also improving tone, texture, and color of skin due to the stem cells within the fat.

Good morning, I hope you are well. It's possible that the fat you had lipoinjected has completely reabsorbed. When was it placed.

If you look up forehead anatomy, especially the various patterns of the frontal muscle you’ll notice that a lot of people do not have muscle coverage on the central forehead.
This is probably what you were seeing rather than a bone contour issue.
Regardless, the area is going to be inherently devoid of host Making successful fat transfer challenging and unpredictable.
Working with dilute fillers is probably a better option.
Best,
Mats Hagstrom, MD