Can I use hidden symbols in the glory of the king Apple Zone?

Can I use hidden symbols in the glory of the king Apple Zone? Yes, the operation method is described as follows.

Tools/raw materials:

iPhoneSE2

iOS 14.3

The glory of the king 1.02

1. Nicknames are often repeated.

2. At this time, you can find the constellation expression, that is, the blank symbol, and try it in the lobby before changing the name.

3. The name typed in this expression is empty.

4. Then click Replace and the nickname will be replaced successfully.