FullCalendar height in week view

you can try to modify this custom css and add it at the end of your theme style.css or theme options custom css

.fc-row.fc-week.ui-widget-content {
    height: 300px !important;
}

And if not this does work…

.fc-day-grid-event .fc-content {
    white-space: nowrap;
    overflow: hidden;
    height: 70px;
}