POK is an open drain output pin and you can leave it floating if you don’t want to monitor the output voltage status.
MAX77827
Production
The MAX77827 is a high-efficiency buck-boost regulator targeted for one-cell Li-ion powered applications with the lowest typical quiescent current in the...
Datasheet
MAX77827 on Analog.com
POK is an open drain output pin and you can leave it floating if you don’t want to monitor the output voltage status.