The MAX20040EVKIT provides 5V output voltage. Users can get other output voltage values by modifying output resistor divider (R9 and R10 in the figure below). The values of R9 and R10 need to meet the requirements specified in the datasheet. Make sure to remove R11 to disconnect FB node from BIAS voltage.
This method is only used when the new output voltage is close to 5V (Let's say 4V or 6V). For bigger change in output voltage, modifying other components such as inductor, input/output capacitors, etc might be needed. Please refer to the datasheet for the component calculation and selection.