U+25C0, ◀
BLACK LEFT-POINTING TRIANGLE

[U+25BF]
Geometric Shapes
[U+25C1]
Presentations of ◀︎
Text
style
Emoji
style
◀︎ ◀️
Note: Character's appearance
may be different on each system.
Text style is forced with ︎
and emoji style with ️

Emoji