To help you get the information you need, here’s what I recommend:
Power sequencing. The MV-MB-V1 likely uses a PMIC (Power Management IC) with a predefined sequence: 3.3V → 1.8V → VDD_CORE → Reset release. osamu2-dis-kb-hpc mv-mb-v1 schematic
The schematic features a multi-rail PMIC. This chip acts To help you get the information you need,