That's strange. After enabling Thunderbolt 4 in the BIOS, I had one unknown device. Installing the Intel Thunderbolt driver showed that device to be the Cypress UCM Client. That is all. No Thunderbolt (TM) Controller entry for me. Regardless, the problem existed even with Thunderbolt 4 disabled in the BIOS. My motherboard is the ASUS ROG Strix X670E-A Gaming WiFi and the CPU is AMD 7700.