No, the point is that instead of the US paying reparations from their own pocket they will allow Iran to tax Gulf countries.
That sentence is just worded badly, I would rewrite it as:
10. Iran to use Hormuz fees for reconstruction instead of demanding reparations from the US.
I think you're right, it's a bracketing ambiguity.
Rather than "Iran to use Hormuz fees for (reconstruction instead of reparations)" it's more likely to mean "Iran to use (Hormuz fees for reconstruction) instead of reparations"