I feel Antonella Cerra is not convincing

I watched Uno di famiglia (2018) and Antonella Cerra was one of the parts I kept noticing. The role needs more detail, but the performance stays on the surface. Some emotions are too simple, and I cannot believe the character enough. Many moments pass very fast, and I do not remember much after them. I do not hate it, but it did not pull me into the story. For me, it does not feel very real in many scenes. Maybe other people will like it more, but this is my feeling.