The Utah Jazz will have money to spend this summer and want to invest their money wisely. Austin Reaves is the obvious candidate because, while he's not young, he's young enough. He's also shown improvement every single season. That alone gives him enough appeal as a target, but another reason why is that taking him from the Lakers would make the pick they owe the Jazz next year even better.
Jazz fans have known since the trade first happened in 2023 that the Lakers owe the Jazz a top-4-protected pick in 2027. It was perhaps the Jazz's most exciting draft asset until the still-unbelievable Luka Doncic trade happened (even more unbelievable that Utah helped with that, but it's not entirely their fault).