App name change is cut off

Is there any guidance on app name length displaying on the home screen? Here is our production app: https://apps.apple.com/us/app/eliant/id1584185534

We want to change the app name to from "Eliant" to "Eliant Engage"

When we do, the space is automatically trimmed and the app name becomes "EliantEngage" on various iPhones.

We tried the hack to include a Unicode space, but it ends up being a double-space and is then cut off with ellipses (https://stackoverflow.com/questions/35495888/space-in-ios-app-name-is-not-showing).

We're baffled because this app contains 15 characters while ours is only 14 (spaces included), but their app name appears normally on an iPhone: https://apps.apple.com/us/app/the-toll-roads/id518393133

App name change is cut off
 
 
Q