Kaomoji
Japanese-style emoticons built from ordinary characters. They read as a jumble to screen readers, so use them as decoration rather than as meaning.
Build a string
Tap the plus on any symbol to add it here, then copy the whole line at once.
Related symbol sets
Most decorative symbols carry no meaning for screen readers. Each copy button is labelled with the symbol's name so it can be identified without relying on the glyph itself.