Also, I think its a bit 'hidden' on the app & I've had to show others while in a bus line wait how to retrieve them.
From the home page, click on the 3 hash lines 'menu' on the lower right of the screen. Then click in 'resort hotel'. Then click on 'bus wait times'. They should appear for your resort. They're not always super accurate & change often while you wait, but I still like to use them to determine when to leave my room, or table while I'm eating, or see if I have time for a restroom break or not. It also helps to dispel the 'bus start times' for the morning. You can see they start before the 'official line.'