Didn't happen.
I assume you're referring to Musk's tweet about a "civil war in the UK being inevitable".
Been covered in detail, speculation is not incitement. And quite honestly, I'm not sure how far off-base he actually is given how the country's going since Labour took power.
It's only been about a month since their elections, hasn't it? They've changed the place that much? or haven't? To be completely objective it might be better to get some data so it doesn't look like fantasy wishful thinking.
Speaking of..."inevitable" sounds like simple wishful thinking, not incitement(Do it!), certainly not de-escalation. But, a mob can only be whipped up with mis/disinformation so many times before the general figure out the gambit, moderate their emotions, re-orient to reality with more wariness, then it's just the hardcore and grifters selling pitchforks and t-shirts. Real troublemakers jailed. Younger generations in an adaptive educated culture learn savvy to recognize and navigate the waters.
The idea of incitement might get some traction with a few folks from it seeming that Muskva and crew thought Twitter shaped society through individual hearts & minds, more than society and hearts & minds shaped twitter before he bought it. With Xitter spiraling down the drain after him putting his theories into practice it would appear his ideas were wrong. And there were some doozies that were related..twitter files...
Also with regards to incitement, in the linked Verge article in the op
it’s unclear if the order for X, the site formerly known as Twitter, to ban certain profiles is linked to supporters of former Brazilian President Jair Bolsonaro or members of the far-right movement involved with the January 8th riots.
Letting rioters on the platform might seem like enabling incitement under the veneer of free speech. That accusation would require a trend to hold water.
Regardless of that, if it's just rioters being kept from xitter it doesn't appear to be authoritarianism. A word that implies death sentence for serious agitators and long prison sentences for minor arbitrary infractions against those in power, not the people and their state, for it to not be hyperbole. Requests for twitter bans seems rather light touch.