the year Degrom won with a 10-9 record he threw 217 innings, so I believe the record could be overlooked that particular year, however, dating back to 2015 these were the 20 game winners:
Keuchel 2015
Arrieta 2015
Porcello 2016
Scherzer 2016
Snell 2018
Verlander 2019
Cole 2019
... Common theme here, ALL but Cole in 2019 won the Cy Young award, and thats because Verlander beat him out (he finished 2nd)
I do honestly believe the voters view 20 wins as a key factor for winning the award