Kelleher - 16 appearances over 3 seasons
Rhys Williams - 19 apps, 1,350 minutes. Shipped off on loan and now demoted to Liverpool u23s, not getting a single appearance this season.
Curtis Jones - 65 apps, 3,768 mins over 4 seasons.
Neco Williams - 33 apps, 1,831 mins over 3 seasons. Shipped off on loan.
Nathaniel Philips - not from Liverpool academy
Harvey Elliot - not from Liverpool academy
So essentially, one academy player actually integrated.
Since the season Jones debuted in 18/19 we have:
Mason Greenwood - 129 apps, 7,559 minutes before being outed as a scumbag
Brandon Williams - 50 apps, 3,097 mins
Dean Henderson - 29 apps, 2,602 mins
Anthony Elanga - 17 apps, 782 mins and counting
Tahith Chong - 16 apps, 539 minutes
Angel Gomes - 10 apps, 320 mins
James Garner - 7 apps, 316 mins
3 with considerable time and Elanga will be there by end of season so 4.
Now this also doesn't include Rashford, McTominay, Axel and Andreas who made considerable appearances in this time but debuted in the preceding couple of seasons. We've also then had the odd appearance for the likes of Mengi, Laird, Levitt, Shola, Hannibal etc which can increase in the next year.
So yea, it isn't even really close tbh.