Hi, 
I just release my game asset here : https://sanctumpixel.itch.io/loreon-kingdom-pixel-art-character-asset

But I cant see it on Most Recent tab : 
https://itch.io/game-assets/newest

So I can't get any views.

Can anyone help me? Or it need take few days to appear here?

It will take a day, day and a half, because it has a price tag attached, and so it has to be seen by an admin first. There's a checklist in the FAQ explaining that and other possible reasons.