“An unexplained delay of four months or more can constitute laches and result in denial of mandamus relief. Here, relators did not file the petition for writ of mandamus until July 28, 2021—more than four and a half months from the challenged oral ruling and three months after the trial court signed the complained-of order. We conclude that relators’ unexplained delay bars their right to mandamus relief.” In re Wages & White Lion Investments LLC, No. 05-21-00650-CV (July 30, 2021) (mem. op.) (citations omitted).