Upon closer inspection, it turned out to be the entire QR logo inside the engine: (thanks @AvioesEJogos for the photo, I also had a picture but this one is a better depiction of the issue)
The thing is, this is the first time that I’ve seen red fanblades on a 777, so I can confirm that this issue only appeared after 21.6 since I have flown the QR 777 before the update (and haven’t witnessed anything similar to that.)
Thanks for reading and any solutions/answers will be appreciated. 😊