minecraft-bedrock-json-schemas/source/general/array_2_number.json

{
  "$id": "general.array.number.2",
  "type": "array",
  "title": "Array Of 2 Items",
  "description": "An array of 2 numbers",
  "items": [
    { "type": "number", "description": "An number", "title": "X" },
    { "type": "number", "description": "An number", "title": "Y" }
  ]
}