Can't see any ad so far

I’ve started using Brave for a week, but no ad has been shown so far. The reward setting page seems different, which I can’t find my toggle botton on my page(see attched, the upper one is mine). I’d reinstalled Brave but it remained this way. Could anyone help?

截圖 2021-07-07 上午9.55.07

Read these articles and see whether any of this helps. Also, what device are you using?