The sparkle of snow using the Substrate Material in Unreal Engine 5.6.1 isn't working

Hello,
I followed the YouTube link below to create a Substrate Material, but the snow glint effect doesn’t seem to be working.
Even after recreating the material multiple times, I still can’t see the sparkling (glint) effect on the snow.

youtu.be/jDykD8HULTw?si=ig_HmfT4cbcGa0bx

I’ve adjusted the project settings as shown below and also entered the required commands in the console.

The screenshots attached show the current state where the glint effect is not visible.

If you happen to know a solution, I would greatly appreciate your advice.
(My English isn’t very good, so I used a translator.)