To save a bomb, it is possible to roll from the doorway onto the platform with similar to a Gravity jump - hold forward just before the pause to disable gravity.

Entrance condition:

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

Requires:

{
  "or": [
    "Morph",
    "h_artificialMorphSpringBall",
    {
      "and": [
        "Gravity",
        "h_artificialMorphIBJ"
      ]
    },
    {
      "and": [
        "Gravity",
        "h_artificialMorphBombHorizontally",
        {
          "or": [
            "h_additionalBomb",
            "canTrickyGMode",
            {
              "and": [
                "canTrickyJump",
                "canGravityJump"
              ]
            }
          ]
        }
      ]
    }
  ]
}

Exit condition:

{
  "leaveWithGMode": {
    "morphed": true
  }
}

Dev note: It is possible to cross with a single Power Bomb, but it requires a last pixel jump with a frame perfect forward press. A crab hit could bounce Samus onto the middle platform, but the gravity jump is better. If Samus has a blue suit and cant pause, then she also cant boost from the crab.