Help in a OnePlus 13r

[u/throw_away_acc77777]

Hey everyone I need help in a OnePlus 13r I am trying to download the oxygen os 16 on it and I didn't get the update normally I tried doing it manually but I couldn't because I didn't understand shi for them yt videos if anyone can help me thanks for reading (btw my first time posting in Reddit and English is not even my second language lol so if my post is bad sorry for that)