No. The icons are integrated directly into the firmware of the bracelet and no third party application can add them.
Only Xiaomi can add them into the firmware and if they do, we'll always update our application to give you all the great features like multi-line text display. Please do not down-rate us or ask us to add icons. It's truly not technically possible.
Some users also tends to believe that we removed some icons in latest application version, that is of course not true. It's the other way around - we added feature that you can select icons (from all 5 available) while in previous versions there was always the default one and you could not change it.
Icons available since firmware V126.96.36.199: