How can Sarada copy and use genjutsu with one tomoe sharingan

[Mori Jin]

She never used it, Leonardo was a master at painting but that wasn't his ideal medium , is he not still a genius

This is about Sakura and her inability to use Genjutsu techniques, even with an affinity for it. Kindly stick to the topic.

 

[Mori Jin]

Being a genjutsu type does not require you to cast it. She is capable, she just does not.

In your cannon movie (The Last) she is held as the most skilled in genjutsu, saving everyone else including Nardo from being put under genjutsu.

She is a beast in genjutsu barring ones backed by those with high visual prowess, seeing as she was put under genjutsu by a rinnengan.

Watch the movie again, everyone broke out of it. Naruto stayed in it, there was no trouble breaking out because he didn't even try. It's a canon* movie not cannon