Load all potree pointcloud data then process on that

I want to load all points on the screen where camera is or load all points from the pointcloud and then I want to raycast on that.

problem is when I raycast on that sometime if points are not loaded then it is not detecting the point and generating wrong output.

My function

export function loadPotree(Potree, path) {
return new Promise((resolve, reject) => {
    Potree.loadPointCloud(
        path,
        '',
        (e) => {
            resolve({ pointCloud: e.pointcloud, res: e });
        },
        (error) => {
            reject(error);
        },
    );
});

}

But it does not load all point where camera is, so how can I do this ater all points load.