This syntax will change the time picker to 24hr clock, set 1st day of week to Monday, and display the time picker to the right of the calendar (instead of with an extra click below)
{ display: { components: { useTwentyfourHour: true } } }, { localization: { startOfTheWeek: 1 } }, {display: {sideBySide: true}}
ref: https://discourse.hkvstore.com/t/datetimepicker-locale-time-format/5907/1