Yes, On the phone, in settings, under data usage. Depending on the phone the path may be different.
Your phone shows each app and how much data is used as well as a total.
Android phones can be set to your bill cycle so you can see current as well as past use by bill cycle.
(The following is included after all posts to save typing) I don’t work for AT&T. My replies are based on experience and reading content available on the website. Our answers are honest, but not always appreciated. If you posted personal information, please edit and remove.
*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.