It's likely easier to generate a matching photo these days than process some of the visual captchas. So it would be pointless to implement.
I've never been able to see the hand icon ever since and no one else seems to have documented its appearance. However, after some searching, I was able to find [1] (archived at [2]) which should serve as sufficient proof of this existing and not something that my mind hallucinated out of those "drink a verification can" memes.
(For people trying to visit [1], you should copy the square brackets at the end of the link, which HN leaves out when adding the anchor tag.)
[1] https://google.com/recaptcha/challenge/hand-gestures?d=[]
Seems to be working if you percent-encode them:
https://google.com/recaptcha/challenge/hand-gestures?d=%5B%5...
WD-42•11h ago