Here is the direct UN report - https://news.un.org/en/sites/news.un.org.en/files/atoms/files/Mission_report_of_SRSG_SVC_to_Israel-oWB_29Jan_14_feb_2024.pdf

Here’s it’s conclusion (edited for clarity):

October 7 and Hostages: Conflict-related sexual violence (genital mutilation, sexualized torture, or cruel, inhuman and degrading treatment) occurred at several locations across the Gaza periphery, including in the form of rape and gang rape, during the 7 October 2023 attacks. Clear and convincing information that some hostages taken to Gaza subjected to various forms of conflict-related sexual violence (as described above) and reasonable grounds to believe that such violence is ongoing, including against women and children. Unable to establish the prevalence of sexual violence and concludes that the overall magnitude, scope, and specific attribution of these violations would require a fully-fledged investigation.

Occupied Palestinian Territory (i.e., conducted by Israel and settlers): They did not visit Gaza. Cruel, inhuman and degrading treatment, including various forms of sexual violence towards detainees (39% of whom are held without trial). Invasive body searches including unwanted touching of intimate areas, including genitial areas, and forced unveiling of women wearing Hijab; beatings; threats of rape against women and threats of rape against female family members (wives, sisters, daughters) in the case of men; and inappropriate strip search and prolonged forced nudity of detainees, including during interrogation and during transfer to other detention facilities. Taking and circulating pictures of women detainees on personal phones of soldiers and investigators and depriving women of menstruation products. Sexual harassment and threats of rape, during house raids – including at night – and at checkpoints. Intimidation, including threats of rape, if conditions of detention were reported or publicly disclosed after liberation.