Generously, two of those I would classify as "investigating" with only one actually using that word but the investigation started in 2023 and I've heard nothing of it.
He and his businesses have had several interactions with the federal government of varying antagonism but this is nothing like Trump firing Comey.
I think that it's pretty apparent that the pdf you linked is a pretty partisan document that makes a lot of tenuous links between Musk recommending firing the low level employees and his interactions with the heads of those agencies.
It is not unreasonable to expect that someone given this level of trust over the government should not have even an appearance of a conflict of interest. The mere fact that he himself is someone who is the beneficiary of billions of dollars of spending is an actual conflict.
I don't disagree with that at all but the appearance of a potential conflict of interest is a far cry from the assertion that the op made which is an exaggeration of the document linked which is an exaggeration of the appearance of conflict of interest.
He and his businesses have had several interactions with the federal government of varying antagonism but this is nothing like Trump firing Comey.
I think that it's pretty apparent that the pdf you linked is a pretty partisan document that makes a lot of tenuous links between Musk recommending firing the low level employees and his interactions with the heads of those agencies.