On this page: https://consumer.huawei.com/en/community/details/P20-Pro-Bootloader-Unlock-Code/topicId_164570/ https://consumer.huawei.com/en/community/details/

On this page: https://consumer.huawei.com/en/community/details/P20-Pro-Bootloader-Unlock-Code/topicId_164570/ https://consumer.huawei.com/en/community/details/P20-Pro-Boo... there's someone from Huawei who acknowledges the policy change, with a date. Maybe check archive.org for the mentioned time and url? HTH.