Get dataset count and shown items from repeater

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Hey,
I have a lazy load on my page.

I need a code to hide an element, if all entries from my database are shown in the repeater.
Let’s say I have 10 entries. When all 10 entries are shown in the repeater “button1” should be hidden.

function PageCount(event) {
 let Count = $w("#dataset1").getTotalCount();
 let CountRepeater = $w("#listRepeater").data.length.toString();

 if (Count === CountRepeater) {
        $w("#button1").hide();
    }
}

How can I get the count of the repeater (not from the database)