Like KingTiki said, most duration spells in the cleric list require concentration. Maybe you are more familiar with a different version than 5e?
One big spell cleric's are missing right now is spiritual weapon. It's a Lv2 non concentration spell that lasts 1 min and gives clerics a ranged attack for their bonus action. This is one of the very few duration spells that doesn't require conc. Once this is in the game clerics will feel much better.
There's a multitude of reasons that the 5e cleric is stronger than the BG3 cleric, but I'm not going into it unless prompted.
