Before I was able to go into data and on the list of apps pick one and get a chart comparing the global use and the apps use:
Has this detail view disappeared in Android 7.0?
No. You can try wiping your cache partition as suggested here:
Turn off your device
Press a combination of Vol + + Vol - + Power key buttons and hold them down.
Release only the Power button when the device vibrates
Release the other buttons when the Recovery Menu screen appears
Using the Vol +/Vol - buttons to navigate, select Wipe cache partition
Press the Power key , which will act the enter key on your keyboard.
Wait for the process to finish.
You can then reboot the device and see if your problems are fixed