Even in the internal schematic of the ESP32-S3-WROOM-2, though SPICLK_P (GPIO47) and SPICLK_N (GPIO48) are powered by VDD_SPI (so have the same voltage as the flash and PSRAM under ESP32-S3-WROOM-2 the metal shield) I do not see those SPICLK_P and SPICLK_N being connected to anything.
So what are those two pins used for, and why are they driven by VDD_SPI?
Also, for the ESP32-S3R8V, in esp32-s3_datasheet_en.pdf Table 2-1
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