Cjkv weird glyphs? What's wrong with my computer?

Not a typst issue, but my computer issue:

/* imput method and text editors???
(Fcitx5 and Kate/SublimeText) */
花径不曾缘客扫

/* browser, system and terminal
Firefox, Debian+KDE, Nano editor */
#set text(font:"Noto Sans CJK SC")
花径不曾缘客扫

How to fix?
cjkv_glyph

And I can’t search the weird glyphs online as my browser will auto convert them into right ones…

If you look carefully, you’ll find that 花 and 客 are also different

The character shapes are different in different parts of East Asia, and they were unified in Unicode.
The first line of your screenshot uses Japanese glyphs. You can reprodue it with Typst like this:

#text(font: "Noto Sans CJK JP")[花径不曾缘客扫]

#text(font: "Noto Sans CJK SC", lang: "ja")[花径不曾缘客扫]

I guess you’ve installed via apt install fonts-noto-cjk, which downloaded OpenType Collections containing both SC and JP glyphs?