> From: badli al rashid <theothernighttheotherday@gmail.com>
> Date: Wed, 30 Apr 2025 14:50:46 +0800
> Cc: 78155@debbugs.gnu.org
>
> The output shows below
>
>              position: 71299 of 757020 (9%), restriction: <70709-71519>, column: 15
>             character: ⇒ (displayed as ⇒) (codepoint 8658, #o20722, #x21d2)
>               charset: unicode (Unicode (ISO10646))
> code point in charset: 0x21D2
>                script: symbol
>                syntax: _ which means: symbol
>              category: .:Base, 5:symbol, h:Korean, j:Japanese
>              to input: type "C-x 8 RET 21d2" or "C-x 8 RET RIGHTWARDS DOUBLE ARROW"
>           buffer code: #xE2 #x87 #x92
>             file code: #xE2 #x87 #x92 (encoded by coding system utf-8-unix)
>               display: no font available

So the font you are using doesn't have a glyph for that character.
What font is that?  What does the following show in the echo area?

  M-: (face-font 'default) RET