Rangers will not be punished for playing the national anthem despite fans displaying disrespectful banners about the royal family.
The matter will be decided in due course after the European football's governing body opens proceedings.
Rangers played God Save the King and held a minute's silence to honor Queen Elizabeth II, who passed away last week.
Uefa did not grant a request from the Ibrox club - and reportedly Chelsea and Manchester City - to do so, saying they wanted a "consistent pre-match ceremony without any celebratory activities across all UK venues".
After the silence, the crowd joined in song as the music was played, with one end of the stadium dedicated to the Queen.
There was no time to reflect before the Celtic-Shakhtar game.
Celtic, like Rangers and their respective opponents, wore black armbands instead of asking for a silence before the game.
The Ukrainian hosts were allowed to show anti-war messages on their screens before the game.