https://www.androidsage.com/2020/07/20/download-oneplus-8-latest-update-oxygen-os-10-5-10-in-10-5-9-eu-and-10-5-11-na/
Download OnePlus 8's latest OxygenOS 10.5.10 [IN], 10.5.9 [EU] and 10.5.11 [NA] update