Looks like the adjuster "post" inside has broken.
You might be able to detach the lens and put it on your original headlight. Might require baking. I know I have one here I took off an old headlight I stripped for parts.

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2021 X5 xDrive40i
2015 X5 xDrive35i MSport
(Traded) 2013 X5 xDrive35i