Another UFO from a Reddit thread, notable because we have times/locations/flight numbers etc, the video and pictures are a bit spread out in the thread, video attached and link to gallery below
https://www.reddit.com/gallery/ts7zrt
Object filmed from aircraft
From time and location posted by OP it is most likely flight ABX957 at ~6:07 UTC 27/3/22 a Boeing 767-300 (Cargo)
https://globe.adsbexchange.com/?icao=a437c0&lat=47.452&lon=-49.546&zoom=7.7&showTrace=2022-03-27
3d 767 (maybe not quite the exact same model) here https://veer.tv/photos/running-bulls-1054
OP says object was 60 degrees down at 10k feet ... Read even more