Ok, the Universal Acceleration is property of the Universe.
It accelerates the whole Earth up together as integral chunk.
Changing altitude in that case won't change the effect of gravity.
The one, single Earth is "accelerating" towards objetse at lower altitude and objects at higher altitude?
Keep one gravimeter low (say, at sea level) and measure how fast is Earth acceleating towards it.
Bring another gravimeter high (say, in an anchored balloon above the same point) and measure how fast is Earth accelerating towards it.
It is well known (measured and documented) that in reality the "acceleration of the same ground towards such two points" differs.
Why and how would the same Earth at the same time accelerate differently towards two points one above the other?
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Some tried to explain the difference by existence of some "celestial gravitation"
that would selectively exist between celestial bodies and earthly bodies,
but not between two or more earthly bodies alone.
Some massive celestial bodies, say, "the Dome", would have gravitational properties and pull earthly bodies from above to reduce their weight.
("We don't know the actual configuration of the bottom surface of the Dome.")
But for that to affect earthly bodies the earthy bodies would have to have the same properties.
Electric fields only exert forces on bodies with electric properties (electric charge ability). Bodies with such properties also interact with each other that way.
Magnetic fields only exert forces on bodies with magnetic properties (magnetic polarization ability). Bodies with such properties also interact with each other that way.
Gravitational fields (celestial or not) only exert forces on bodies with gravitational properties (mass). Bodies with such properties also interact with each other that way.
Plus, nobody has ever shown the existence of such celestial bodies (say, "the Dome") in reality.
"Rocket hit the Dome at the altitude of 73 miles."
"North Korean ICBM reached the altitude of 2314.5 miles on July 28, 2017." (from:
https://en.wikipedia.org/wiki/Hwasong-14)