Is my MacBook (2017) 'up' key broken?

[zx128k]

I can't tell if something has snapped and it needs a new part or it just fell out?

 

[4sallypat]

The butterfly mechanism appears to be intact.
Take a look at the black key's underside - if the small "hooks" are damaged, buy a replacement on eBay for a few dollars..

 

[zx128k]

The butterfly mechanism appears to be intact.
Take a look at the black key's underside - if the small "hooks" are damaged, buy a replacement on eBay for a few dollars..

I can't see an obvious damage, but I'm not sure what I'm looking for.

When I push it back in it doesn't click back into place, just stays loose and falls out again.