There's only one way the Miami Heat would reportedly be interested in trading for Anthony Davis, and it exists in a scenario where the team misses out on Giannis Antetokounmpo. In addition, as NBA insider Jake Fischer notes, it'd also have to come in a buy-low scenario.
But that's not just unique to the Heat. There aren't many teams in the league at the moment that are willing to go "all-in" for AD. At this stage of his career, and with his injury history, it just doesn't make sense for any team to put their prime assets on the table for AD.