MacBook A1989 missing rails PP3V3_S5 and PP1V8_S5

[Nikan]

Greetings and Salutations,

I have gotten an A1989 Macbook board number 820-00850-A which has two missing rails -> PP3V3_S5 and PP1V8_S5.
PBUS is at 12.6V every other voltage made by the PMIC is just fine.

Resistance to ground -> PP3V3_S5 ~ 220Ω
Resistance to ground -> PP1V8_S5 ~ 220Ω

PP1V8_S5 and PP3V3_S5 are not shorted together.

Voltages up to PP2V5_NAND_SSD0 seem to be fine.

Can anyone confirm if these resistances are normal for this board?
What could be causing this issue?
Is there a way to rule out a defective PMIC without replacing it, as I do not have a donor.

Thanks in advance and best regards from Germany,
Nikan