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Negative power of LTM4626

hi team

The circuit below is a circuit that uses LTspice to produce a negative voltage.

LTspice's LTM4626 has SGND and PGND.
However, the LTM4626 datasheet has one ground.
Could you tell me the pin numbers of SGND and PGND?
Because the value of pgood is affected by the value of Rfb in a single ground.
When designed as shown below, the value of the pgood is constant at 3.3 V.

This is a simulation.
Does it actually work like a simulation?