Thanks for the answer @ophadece, but I think i asked the wrong question. What I meant to ask is why some hymns before the gospel can’t be said in communion. (Which applies to the hymns I said before).
I’m pretty sure there is a doxa si o theos eemon before the words hoos epchois. However it’s not in the text. And I’m sorry for not sending them earlier, but here are the recordings I’m referring to
https://media.tasbeha.org/mp3/Hymns/Fasts/Nativit…