It is not an emoji but a unicode character and HN doesn't render it, your OS does.

It may not be in the Emoji character block formally, but casually speaking it’s not wrong to call it an emoji, since emoji is basically just a picture character, and this is no less a picture character than what’s formally codified as ‘Emoji’ in the Unicode standard.

	▲	dgellow an hour ago \| parent [-]
		In addition to this, what I meant to convey is that it does show exactly like the iOS/iPadOS emojis, in color, with details, etc. Not the non-emoji font unicode character