According to Musk's new biography, as reported by the AP, "Ukrainians in September 2022 had asked for the Starlink support to attack Russian naval vessels based at the Crimean port of Sevastopol"
The support was not given. According to the same book, as reported by CNBC, Musk later said that "Starlink was not meant to be involved in wars. It was so people can watch Netflix and chill and get online for school and do good peaceful things, not drone strikes”
He also said that “The Starlink regions in question were not activated. SpaceX did not deactivate anything"
Recently, according to CNBC, members of the Senate Committee on Armed Services have asked the Pentagon for information of if Musk had "directed the unilateral disabling or impediment of function of Starlink satellite communications terminals used by the Ukrainian Armed Forces in southern Ukraine in 2022"
It seems that, until the Senate Committee's request is fulfilled (if it ever is), then it remains a question of whether Musk deactivated this part Starlink, or if was never active in the first place