All-day events in Resources view

Yes, it is possible.

There is no live demo available but you can try this example:

<div id="dp"></div>

<script type="text/javascript">

    var dp = new DayPilot.Calendar("dp");
    dp.startDate = "2022-03-25";
    dp.viewType = "Resources";
    dp.showAllDayEvents = true;
    dp.columns.list = [
        { name: "Meeting Room A", id: "A"},
        { name: "Meeting Room B", id: "B" },
        { name: "Meeting Room C", id: "C" },
        { name: "Meeting Room D", id: "D" },
        { name: "Meeting Room E", id: "E" },
        { name: "Meeting Room F", id: "F" },
    ];
    dp.init();

    dp.update({events: [
        {
            start: "2022-03-25",
            end: "2022-03-25",
            allday: true,
            id: 1,
            text: "Event 1",
            resource: "C"
        }
    ]});


</script>