Why does my sprite list not contain the other sprites from the same source texture?

I just started playing around with UE and I was using the Paper2D textures to create sprites. While following some tutorials I noticed that they contain a sprite list that’s populated, but for some reason, I don’t have anything in it.

From the pictures, I just have the first two sprites. In the bottom right, is my sprite list, that should be populated.

I have the same problem