Depends on the race and the leaders. It has worked out great for Alpecin in recent years. It's a bit different with UAE as they don't have a very strong sprint, but they should still have plenty of firepower to go against the others. I hope van Aert is at his best.
I think Philipsen has benefitted twice from being MVDP's teammate at Roubaix. That said, I don't think he had much to do with him winning the race on either occasion, and few would call him a leader even this year despite his previous top 2 result. A traditional domestique like Vermeersch has been more influential, imo.
2024 MSR is a good example of an Alpecin multiple-leader strategy that worked, but I can't think of many others.
But the reason I don't think a multiple leader strategy can work for UAE (or Alpecin at Roubaix, really) is that everyone involved has so much more at stake in the true leader winning to actually invest in the chances of Plan B.