Yes, it was always there, and I think it used work.
Then a few weeks ago I discovered that the icon image itself doesn't show. There was only a gray X next to the index number. On desktop, in the mobile page simulator inside "Customize" it was showing the icon, and I could not make it appear, so I decided to hide the whole thing.
Not having the 20Nov update at that moment, the icon had no options, so I hid it with a line of CSS.
After that I updated Laytheme, and I saw the options for the Cart Icon Mobile. I deleted the CSS line and set it to always show in the options, to see if the problem of icon image not showing has been fixed or not.
The icon image was showing properly, but the index started showing incorrect values.
This was my timeline of discovering the issues, but they might have been there before, without me noticing.