No, it no recommended to leave the SET_ or DISC_ inputs disconnected.
MAX16050
Production
The MAX16050 monitors up to 5 voltages and sequences up to 4 voltages, while the MAX16051 monitors up to 6 voltages and sequences up to 5 voltages. These...
Datasheet
MAX16050 on Analog.com
No, it no recommended to leave the SET_ or DISC_ inputs disconnected.