On how many sources is the evidence for dark energy based?

In physical cosmology and astronomy, dark energy is an unknown form of energy which is hypothesized to permeate all of space, tending to accelerate the expansion of the universe. Dark energy is the most accepted hypothesis to explain the observations since the 1990s indicating that the universe is expanding at an accelerating rate.

The evidence for dark energy is indirect but comes from three independent sources:

Distance measurements and their relation to redshift, which suggest the universe has expanded more in the last half of its life.

The theoretical need for a type of additional energy that is not matter or dark matter to form the observationally flat universe (absence of any detectable global curvature).

Measures of large-scale wave-patterns of mass density in the universe.