Unexpected behavior using SW vs. HW SPI on ESP32 with the SX127x LoRa module

In any case this is what I see on the SPI lines for HW and SW SPI of this example code (nothing on MOSI):

const PIN_SCK = D18;
const PIN_MISO = D19;
const PIN_MOSI = D23;

// HW SPI
SPI2.setup({ sck: PIN_SCK, miso: PIN_MISO, mosi: PIN_MOSI});
SPI2.write([1,2,3]);

// SW SPI
// const spi = new SPI();
// spi.setup({ sck: PIN_SCK, miso: PIN_MISO, mosi: PIN_MOSI});
// spi.write([1,2,3]);

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