He has pretty good numbers regular season the last 3 years and last year's playoffs in terms on ballhandler
https://www.nba.com/stats/players/ball-handler?SeasonType=Playoffs&SeasonYear=2021-22
This regular season was actually the first year he has been good in transition, 50th percentile before then, it just feels like he's good because everyone is better in transition and his dunks are great.
Other playtypes:
Roll man in PnR... abysmal, sub 20th percentile most years
Iso... excellent last year, averagish this year and prior years, though very good this playoffs.
Post-up- bad this year, averagish the last few and in the playoffs.
Spot-up= good this year and 20-21, average or bad in the playoffs and last year
Overall I'd say that Iso and PnR ballhandler are actually Jaylen's two best playtypes, but he's inconsistent at just about everything, and that's what can kill you in a playoff series. I also think part of it is that in the playoffs his handle issues get exploited by good teams, he can still beat guys with his athleticism, but with good defenses and the looser foul calls guys get their hands in there are he loses it.