Have only just seen this and there maybe better sources for the story but this is what the Guardian 
is saying:
Normally a country holds the chair for two years, but the Philippines was put under pressure from other members of the Asia group to split its tenure and pass the post on to another country after one year. Bangladesh was expected to take over but late in the process, Saudi Arabia stepped in and lobbied for the chair, in what is widely seen as an attempt to burnish the kingdom’s image.
Human rights groups quickly pointed to the irony of the CSW being led by a country in which the gap between men’s and women’s rights, even on paper, is so wide.
Sherine Tadros, the head of the New York office of Amnesty International, pointed out that Saudi Arabia will be in the chair next year, on the 30th anniversary of the Beijing declaration, a landmark blueprint for advancing women’s rights globally.
https://www.theguardian.com/world/2024/mar/27/saudi-arabia-un-womens-rights-commission
On one level I am not that taken aback by it being Saudi Arabia (I wonder what their stance is on TW and self id?) but by whatever might have been the original good intentions of the UN, it is now undermined by political blocs voting to out smart another political bloc just to score points, and rarely about the issue itself. 