Upgrade.... #underpass @ Singapore https://t.co/H71MA8ZnFy
Central Region
[{'url': 'https://t.co/H71MA8ZnFy', 'expanded_url': 'https://www.instagram.com/p/CLjBlLBMyWB/?igshid=19gc2h1v6c0u1', 'display_url': 'instagram.com/p/CLjBlLBMyWB/…', 'indices': [35, 58]}]
MARINA CENTRE
['upgrade', '...', '#underpass', 'singapore', 'https://t.co/h71ma8znfy']
[]
upgrade #underpass
upgrade underpass singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This post is not related to maintenance report feedback for public flat houses."},
    ]

The provided Twitter post does not seem to be related to a maintenance report feedback for public flat houses in Singapore. The term "upgrade underpass" does not mention any specific facility or infrastructure that is typically maintained in public housing estates. Therefore, the post does not meet the criteria for a maintenance report feedback.