Adding points to a plot uPlot

I have a website displaying live data using uplot, because of its low resource usage even with many points per second being added. The issue is that I want the newest datapoint to have a big red point on it so it ‘traces’ the line. My opts section for the u plot looks like this:

const opts = {
    title: "Live-Data",
    width: window.innerWidth * 0.65,
    height: window.innerHeight * 0.8,
    cursor: {
        drag: { setScale: false },
        sync: { key: 'shift' },
    },
    scales: {
        x: { time: true },
        y: { auto: true}  
    },
    series: [
        {},  
        {
            label: "Sensor 1 (mm)",
            stroke: "blue",
            value: (u, v) => v == null ? null : v.toFixed(2) + " mm"
        },
        {
            label: "Sensor 2 (mm)",
            stroke: "red",
            value: (u, v) => v == null ? null : v.toFixed(2) + " mm"
        }
    ],
    axes: [
        {
            scale: "x",
            grid: { show: true },
            values: (u, vals) => vals.map(v => new Date(v).toLocaleTimeString())
        },
        {
            scale: 'y',
            values: (u, vals, space) => vals.map(v => v.toFixed(2) + " mm"),
            grid: { show: true }
        }
    ]
};

But I haven’t found a way to add a point that also disappears (I guess that is the logical for a tracing point) when a new data point is added.

Thanks for any help