On October 9, some Florida voting rights groups filed a federal lawsuit to extend the deadline for individuals to register to vote. The deadline was October 7. League of Women Voters of Florida v DeSantis, n.d. 4:24cv-00412. The case is assigned to U.S. District Court Judge Robert Hinkle, a Clinton appointee.
Here is the Complaint, which mentions that South Carolina a few days ago voluntarily extended its deadline. The lawsuit asks for ten more days due to hurricanes Helene and Milton.