Yukarıda gönderdiğim kodlarla aynı hocam.

Şu kaynakta farklı bir teknik paylaşılmış: https://stackoverflow.com/a/66019449/13757089
Buna dayanarak bir de şöyle dener misiniz?

<?php
$link = 'https://www.instagram.com/r10net/channel/?__a=1';
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $link);
curl_setopt($curl, CURLOPT_REFERER, $link); 
curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36'); 
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); 
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true); 
curl_setopt($curl, CURLOPT_VERBOSE, false); 
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST,0); 
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER,0);
$exec = curl_exec($curl);
curl_close($curl);
if($exec === false){ 
    echo 'Curl error: ' . curl_error($curl);
    exit;
} else {
    echo $exec;
}