With Shohei Ohtani having dramatically limited his aggression on the base paths this season, the Dodgers are in the bottom third of teams in baseball in stolen bases, down from the top third last year. And it's not an exaggeration to say that they can attribute that ranking to almost entirely to Ohtani — he's only stolen 17 bases so far this season whereas he'd stolen 46 by this time last year (and he stole 59 by season's end).
The Dodgers just aren't great runners overall, nor was their roster constructed with much of a care for speed.