Sure it's not suspension related?
So there's a couple of bits on the car if you're mechanically minded. One is the ARB link (anti-roll-bar). The bushes wear and you'll get a definite clunk as it's meant to keep the ARB under tension. The other is the coil spring itself. Not unusual for the springs to break or shear, although you'd likely hear a twang on hard-lock to hard lock, also you can measure the distance from the top of the wheel to the wheel arch if you think one might be broken. Park on the flat to measure. With the wheel off is ultimately easier for a proper inspection.
The final one is the top mount and it's quite difficult to detect unless you raise the front of the car on both sides and turn hard lock to hard lock. The bearing carrier is subject to water, road salt and general debris thrown up by the wheel. The aluminium alloy of the mount can suffer from oxide corrosion and it's this that basically sheers the bearing and you end up with a rough metallic sound.
While you're there - check the shock absorber doesn't have a leak or is weeping which might let the car bottom out over a bump.
2015 i3 REx, 60ah, solar orange. Reversing camera, leather interior, sunroof, park assist, professional navigation.