UZR/150 uses trained and calibrated "experts" who judge what balls are in the zone and should be caught. I'm not sure, if they use launch angles and distance needed to get to the ball.
According to fangraphs, Duran made 34 of 35 plays on BIZ (Balls in Zone). They also factor in plays made out of the zone by great defenders. I'm looking at fangraphs, now. Duran has made 12 OOZ (Out of Zone) plays in 215 innings, but I don't know how many OOZ plays he had a chance to make.
I can see that his OOZ plays to Innings is very low compared to many others, but it's not the worst. They have Duran dead last out of 60 CF'ers with 200+ innings in CF at -25.6 UZR/150, They gave him a -0.6 ARM, which is very bad for the amount of innings. -2.3 Range and +0.1 Errors.
Michael Taylor made 100 OOZ plays in 1021 innings. Buxton 20 in 274 innings. (He made 69-71 BIZ plays)
Link:
https://www.fangraphs.com/leaders.aspx?pos=cf&stats=fld&lg=all&qual=200&type=3&season=2021&month=0&season1=2021&ind=0&team=0&rost=0&age=0&filter=&players=0&startdate=&enddate=
DRS uses a different method and has him at -6 runs. Maybe a lot is due to his arm not just range limitations.