For examples:

1. ❌ (U+274C, cross mark)
2. ⭕ (U+2B55, circle mark)
3. 🌭 (U+1F32D, hot dog)

In Linux, I can verify that these glyphs exist in certain fonts which I have installed, with the command, eg:

    fc-list :charset=1F32D

This will show that the font "NotoColorEmoji.ttf" has the glyph "hot dog".

But no matter which font I choose in Inkscape, they are not displayed properly, often with blanks or seemingly random characters.

What's more strange is that when I open the "Text and Font..." dialog, the characters are displayed correctly in the dialog's text box.  They're just not displayed correctly on the Inkscape canvas.

I tried this on 2 versions of Inkscape, same result:
Inkscape 1.1.2 (0a00cf5339, 2022-02-04)
Inkscape 1.4 (e7c3feb, 2024-10-09)

                      Compile  (Run)
    GLib version:     2.64.6
    GTK version:      3.24.20 (3.24.20)
    glibmm version:   2.64.2
    gtkmm version:    3.24.2
    libxml2 version:  2.9.10
    libxslt version:  1.1.34
    Cairo version:    1.16.0 (1.16.0)
    Pango version:    1.44.7 (1.44.7)
    HarfBuzz version: 2.6.4 (2.6.4)

    OS version:       Ubuntu 22.04.5 LTS

Looks like this bug. https://gitlab.com/inkscape/inbox/-/issues/10103

I will add a link to this post on the bug report, but you are welcome to add your comments there as well.