How to create an invisible Snapchat display name
Setting an invisible display name on Snapchat makes your profile appear blank in chat lists and Stories. The Braille Blank (U+2800) is the most reliable character — Snapchat accepts it as valid text while rendering it as completely empty.
To apply it, open Snapchat, tap your Bitmoji or profile icon, tap your display name, clear the field, and paste one or more Braille Blank characters. Tap Save, and your name disappears from your friends' chat lists and Snap Map.
The Hangul Filler (U+3164) is an equally effective alternative. Both characters work on Snapchat for Android and iOS without being stripped or rejected.