Getting across the lava while artificially morphed requires an HBJ or Spring Fling. For the Spring Fling, jump immediately before the pause triggers. With Morph, Samus can air ball across.

Entrance condition:

{
  "comeInWithGMode": {
    "mode": "any",
    "morphed": true
  }
}

Requires:

{
  "or": [
    {
      "and": [
        "h_canArtificialMorphMovement",
        "h_lavaProof"
      ]
    },
    {
      "and": [
        "Morph",
        {
          "or": [
            "SpaceJump",
            "canTrivialUseFrozenEnemies"
          ]
        }
      ]
    },
    {
      "and": [
        "canLateralMidAirMorph",
        "canTrickyJump"
      ]
    },
    {
      "and": [
        "h_canArtificialMorphSpringFling",
        "canTrickyJump"
      ]
    },
    "h_canArtificialMorphHBJ",
    {
      "and": [
        "Gravity",
        "h_canArtificialMorphIBJ",
        "h_canArtificialMorphBombHorizontally",
        {
          "lavaFrames": 160
        }
      ]
    }
  ]
}
"h_HeatedGModeOpenDifferentDoor"