If you have an adblocker with element hiding capability (I don't think any iOS ones do), hiding the #layers element removes the modal but you still cannot scroll.

If you have a userstyles extension, this works for me

    #layers {
        display: none !important;
    }

    html {
        overflow: auto !important;
    }

I also see the thread just fine. Firefox on Android with uBlock Origin.

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