It sounds like the same toxic middle management which she, and others, took issue with was aware of her attempts to contact Musk and leaned on HR to have her removed.

Likely Musk got her communications and asked her management if there was any merit; and if he had indeed done this, it would be contradictory to his previous communication encouraging employees to go around their management.

If they needed to go around management then likely going through management is not the correct response.