EM9191 not found in LattePanda3Delta m.2Bkey slot

pin 20 → high (1.8V)
pin 22 → high (1.8V)

check pin 28 for power loss acknowledge
pin 24, pin 68, pin 38 → VCC (3.3V)

You might need to contact distributor for a schematic review

Btw, other user can make it work in m.2 adaptor: