@eddieyugo,
Thanks for reaching out!
Glad to see your interest in the feature – unfortunately it is not yet available for mobile yet!
Taken from the official announcement:
Brave Ads are launching today in the U.S., Canada, France, Germany, and the U.K. More geographies will be available soon. Brave Ads will be integrated in Brave’s Android and iOS apps in the coming months. Public documentation about the ad confirmations protocol can be found here. The open source code that support ads and confirmations in the browser can be found here. Advertisers interested in running campaigns with Brave should contact us here.
We appreciate your patience! If you’re interested in trying the feature now, you can download the desktop browser for Windows, macOS or Linux to do so.