How can I check in an array if the From and To dates overlap with other dates in the array ?

[
    {
        "name": "Test_ABC",
        "children": [
            {
                "Von": 1657404000000,
                "Bis": 1657836000000
            },
            {
                "Von": 1657922400000,
                "Bis": 1658354400000
            }
        ]
    },
    {
        "name": "Test0001",
        "children": [
            {
                "Von": 1657490400000,
                "Bis": 1658700000000
            },
            {
                "Von": 1646866800000,
                "Bis": 1647558000000
            }
        ]
    }
]

Unfortunately I do not get further at the point