You can input characters with Unicode code points.
To input a character with Unicode code point in the hexadecimal format at the current insertion position:
Unicode character code to input should be just hexadecimal format as well as hexadecimal code with “U+”, “0x”, or “\u” prefixes. For example, “1F603,” “U+1F603,” “0x1F603,” or “\u1F603” are valid to input “😃.”