Fall into the first Samus Eater in Hellway or the second Samus Eater of Alpha Power Bomb Room. After teleporting and passing through the transition, X-Ray climb 1 screen to reach the space above, to the left of the blue gate. Samus will be off-camera, but the slopes at the top will push the camera up, indicating when the climb is done.

Entrance condition:

{
  "comeInWithSamusEaterTeleport": {
    "floorPositions": [
      [
        1,
        13
      ],
      [
        2,
        13
      ]
    ],
    "ceilingPositions": []
  }
}

Requires:

"h_heatProof"
"h_lavaProof"
"canXRayClimb"

Dev note: Other Samus Eaters can also probably work. When entering with a floor Samus Eater as in this strat, lava protection is necessary: there is no way to enter with more than 4 energy, so even a tiny amount of lava damage would be fatal.