Have the same problem. TT RGB PLUS 2.1.2 и 2.1.3 not detecting SWAFAN EX controller. FANS works at 100% and soft normally detected toughliquid ultra pump with LCD. Problem only with SWFAN EX controller. Looks like software problem. Internal or External USB connection not helped. Cables 100% good.
OS: Microsoft Windows 11 22H2 with all updates 23/07/2023, another soft: GCC, ViperRGB_v3.