There are recordings for 123.9 (departure runway 22R) and 119.1 (arrival runway 22L) available in the archives at:
https://www.liveatc.net/search/?icao=jfk
119.1:
https://archive-server.liveatc.net/k...2020-2330Z.mp3
123.9:
https://archive-server.liveatc.net/k...2020-2330Z.mp3
119.1 is the frequency where the hold short instructions were given.
The first hold short after exiting the runway was read back correctly.
The 2nd hold short instruction, followed by the question as to the gate, was answered by a single word transmission without callsign: "22".
The controller did not challenge the missing readback.
As usual more than one mistake is necessary, luckily the 3rd hole didn't line up and the plane on takeoff roll was instructed to abort (123.9).
This is obviously not the full picture, there could still be pieces missing from what was said.
Maybe the pilot even let go of the button, one can't say for certain without the CPR and the tapes from the tower.
But this is not the NTSB, so speculate is all that we can do.