Xiaomi is still sending out the stable global Android 10 update to the Redmi Note 8 Pro but the update appears to have removed Netflix HDR support. Complaints have also been made over the lack of HD streaming support on Amazon Prime Video in spite of the Android 10 update bringing Widevine DRM L1 certification.
https://www.notebookcheck.net/Stable-global-Android-10-update-removed-Netflix-HDR-support-from-the-Redmi-Note-8-Pro.459378.0.html