Hi.
Welcome to the forum!
I'm no expert, but to me she seems like a normal tabby, (not a pedigree).
Maybe a classic tabby, or a Brown mackarel tabby with a gray field.
She is adorable!
From these pictures I would describe her as a blue tabby domestic shorthair. Most cats are not any particular breed.
If you can get side view pictures of her, preferably standing up, we can help figure out her tabby pattern. She might have a ticked tabby pattern, or some other pattern that isn't clearly visible in these pictures.