visitorId kismini o anki session id'niz ile guncellemeniz gerekiyor.

$visitorId = '28e412d49-cbc2-4t63-8dee-8e89108202bd';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://www.migros.com.tr/rest/regions');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, '{"serviceAreaObjectId":1015010,"serviceAreaObjectType":"DISTRICT"}');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Authority: www.migros.com.tr',
    'Pragma: no-cache',
    'Cache-Control: no-cache',
    'Accept: application/json, text/plain, */*',
    'Dnt: 1',
    'Accept-Language: en-US,en;q=0.9,tr;q=0.8,ru;q=0.7',
    'User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36',
    'Content-Type: application/json',
    'Origin: https://www.migros.com.tr',
    'Sec-Fetch-Site: same-origin',
    'Sec-Fetch-Mode: cors',
    'Sec-Fetch-Dest: empty',
    'Referer: https://www.migros.com.tr/adresime-gelsin',
    'Cookie: VSTR_ID=' . $visitorId;
]);
curl_exec($ch);
curl_close($ch);

Bu istegi gonderdikten sonra ayni session id ile istediginiz urunun fiyat bilgisini alabilirsiniz. Kolay gelsin.