There is obviously no accountability for social media algorithms, anywhere. Facebook/Instagram/YouTube are conspicuously algorithmically downranking (and on occasion overtly censoring) pro-Palestinian content, but the political establishment in Western bloc nations don't care, because they don't want unbiased algorithms - they want algorithms that are biased to push their issues of the day.

And Elon is being followed by some 220 million+ people. That's a not insubstantial chunk of the entire human race, let alone the subset of X users. It's unsurprising that his comments would end up highly promoted by most of any algorithm that significantly weights account popularity, which all do - excepting perhaps TikTok.

To get a warrant you need to present strong probable cause to a judge - not liking what is being promoted would not suffice.