checking out @Apple #iPhone13ProMax https://t.co/r2hb0yvO0B
Apple Marina Bay Sands
[]
BAYFRONT SUBZONE
['checking', '@apple', '#iphone13promax', 'https://t.co/r2hb0yvo0b']
[]
@apple #iphone  promax
checking iphone13promax
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance report feedback."},
    ]

It seems that the Twitter post "checking iphone13promax" does not relate to a maintenance report feedback to a public flat house. The post does not mention any specific issue or problem related to a building or facility, and does not appear to be a complaint or feedback related to public housing. Therefore, the answer is "False" for the "relatedness" field, and the "type" field is set to "none" because it is not possible to determine the type of feedback or issue being mentioned in the post. The "explanation" field is left blank because there is no additional information to provide.