All your notifications from teammates in Front will live in your Shared with me section of the Me section of your sidebar. Any time you're @mentioned on a conversation, it will bump to the top of your Shared with me.

You can search your inboxes for mentions using some of Front's handy search modifiers.

Use the mention: search modifier to search for any conversations where you were mentioned.

You can add to the above query by including the teammate: search modifier to also search comments from specific teammates. You can stack search filters to find conversations where you might have been mentioned by a specific teammate.