They're usually done with SVGs or CSS pseudoelements (a clip-path polygon or borders and rotation) rather than Unicode arrows

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wuhhh 5 hours ago | parent [-]

Exactly, text content goes in a <span>, icon is an <svg>, flex align items center on the wrapper gets you close, nudge the icon to perfection with transform: translate

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reaperducer 4 hours ago | parent [-]

And then the line wraps.

	▲	wuhhh 4 hours ago \| parent [-]
		Alright I’ll take the bait, flex shrink none on the svg, white space no wrap on the text