I am trying to use ‘@expo/vector-icons’ and it seems to work fine when using the Web viewer. However when previewing on a real device using the expo app it does not appear correctly.
I saw something like this the other day, but ran out of time to figure it out. I am not sure if this problem is specific to snacks. When I exported the snack and ran it locally it still failed (although I think it crashed, if I remember correctly.) If I created a new project with expo init ...; expo install @expo/vector-icons and then copied and pasted the App.js from the snack into the new app it worked correctly. I was not able to find the relevant differences between the exported snack and the new app in the time I had available. At one point I was also getting a Chinese character instead of the expected AntDesign icon on the device, while the web preview showed the correct icon.
Sorry I can’t remember the details better. Maybe try creating an app locally with expo init and see if you still get the same results.