The Privacy Hub on the New Tab Page for Brave mobile now allows you to view how much data you've saved since using the application, along with the total ads/trackers you've blocked, the estimated time saved and much more. Detailed information in the Privacy Hub can be accessed using the widget on the New Tab Page:

The New Tab Page stats shown on your device  Trackers & Ads Blocked count, Data Saved and theTime Saved refer to:

• Trackers & Ads Blocked: This tracks the amount of Trackers/Ads blocked by Shields since using your browser. 
• Data Saved: This is the estimated amount of data (bandwidth) Brave has saved you while browsing.
• Time Saved: This is the estimated amount of time (in Hours/Minutes) you have saved by using Brave.

In the detailed view of the Privacy Hub, you can drill deeper into what specific ads, trackers and other content was blocked in Brave. Additionally, users who have the Brave VPN enabled can view what content was blocked by the VPN across all apps outside of just the browser. Scrolling down reveals options to view all alerts as well as all time lists of content blocked by Brave:

All Alerts (Brave VPN)

The All Alerts screen allows you to view all content blocked by the Brave VPN, including content blocked in other applications outside of Brave. These can be filtered by category by tapping the desired content type at the top of the page:

All Time Lists

The All Time Lists screen displays all ads/trackers blocked by Brave Shields and/or the Firewall + VPN when using the browser. Using the options at the top of the page, you can swap between viewing all ads/trackers blocked  in browser or view this same list organized by website.

Note that this data is private and remains local to your device — it is never sent anywhere else. Additionally, this information can be cleared at any time from the Settings --> Brave Shields & Privacy menu. You can also elect to show only Shields Data, only Show VPN Alerts or toggle both off completely: