Just posted a photo @ Subway Singapore https://t.co/ZPiLHOjTMK
North-East Region
[{'url': 'https://t.co/ZPiLHOjTMK', 'expanded_url': 'https://www.instagram.com/p/CHdBRwOnNeV/?igshid=1odmlx5hd17k9', 'display_url': 'instagram.com/p/CHdBRwOnNeV/…', 'indices': [39, 62]}]
SENGKANG TOWN CENTRE
['posted', 'photo', 'subway', 'singapore', 'https://t.co/zpilhojtmk']
[]
just posted photo subway
posted photo subway singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This post does not relate to maintenance report feedback for public flat houses."},
    ]

It seems that the post does not mention anything related to maintenance report feedback for public flat houses in Singapore. The post only mentions a photo of a subway in Singapore, which does not provide any information about maintenance reports or public flat houses. Therefore, the answer is "False" for the question "Does the post relate to a maintenance report feedback to public flat house?"