This is the first thread that comes up when one searches "Instagram Story Strong Font Identification." In theory it's the same font application, just two years later the font has changed.

Hopefully if someone else looks up this font and stumbles across this thread, they'll see both the older answer and the updated answer.

Have a good one.

WAIT Y'ALL NEW 2021 IGS FONT IS JUST AVENIR. UNDER MY NOSE THE WHOLE TIME DUH

This thread is old, so I will admit that disconnect. Two years ago SF Pro may have been the font they used but this is from today, and clearly SF Pro isn't the font used. Maybe a newer thread is in order. Here's a screenshot from Instagram Stories, today, using the "Strong" font option that was requested up top.

I'm aware this is a necrobump but this is bothering me so much and both of y'all are dead wrong

I'm looking for the font now but there is no way it's Helvetica, that's a dumb answer
No way it's SF pro either—the o in SF pro isn't round like that

The closest match I've found so far is PROXIMA NOVA but even that isn't exact—there are glyphs like the Q which don't line up, and the skew in the oblique versions of the font is ever so slightly off

Looking in the name of work so will come back with an update but y'all are seriously so off the money it's not funny