If you're working with a recent version of Flutter, it will automatically use the "Material 3" look and settings.

I recorded this course with Material 3 BUT at the time where I did record it, this mode had to be enabled manually by setting useMaterial3 to true when working with themes.

You'll see that in the next lectures.

Since Material 3 is the default now, useMaterial3 no longer needs to be set to true, hence you can and should skip that setting. The rest of the code shown in the lectures remains unchanged though.