The address is tagged incorrectly.
The address listed in wikipedia is DD-36, Salt Lake, Sector-1, Kolkata-700064, which would give us
...
addr:housenumber = 36
addr:block = DD
[[addr:place = Sector-1]]
addr:city = Salt Lake
addr:postcode = 700064
...
The address listed on their website is DD Block, Sector-1, Salt Lake City
Kolkata, West Bengal 700064 which would be the same as above just without the housenumber

"I should have tagged this as canteen instead of fast food"
OSM snapshot date: 2025-12-27T02:09:53Z
POI has no name
POI types: building amenity-fast_food
#CoMaps android 2025.12.28-2-FDroid

"someone should really check out if this is the correct name or if some users incorrectly tagged their home like this"
OSM snapshot date: 2025-12-27T02:09:53Z
POI name: My apartment
POI types: tourism-apartment
#CoMaps android 2025.12.28-2-FDroid

Unable to answer "What’s the name of this street?" for way/397947599 via StreetComplete 53.3:

Check yourself

Unable to answer "What’s the house number of this building?" – Residential Building – way/1344694192 via StreetComplete_ee 59.2:

I don't think houses get any numbers in these locality

"There is a sign board that says (originally in Bengali) 4 and 3 wheeled vehicles are not allowed: by order of Arambagh Municipality. Need to tag that on the road in future."
OSM snapshot date: 2025-12-27T02:09:53Z
POI has no name
POI types: highway-residential
#CoMaps android 2025.12.28-2-FDroid

"The breakfast is open from opening till 12. Delivery and takeout available."
OSM snapshot date: 2025-12-27T02:09:53Z
POI name: Kasahara
POI types: cuisine-chinese cuisine-indian amenity-restaurant
#CoMaps android 2025.12.28-2-FDroid

"I have mapped the building geometry incorrect here"
OSM snapshot date: 2025-12-27T02:09:53Z
POI has no name
POI types: building
#CoMaps android 2025.12.28-2-FDroid

"The tagging is incorrect. It is not a town hall."
OSM snapshot date: 2025-12-27T02:09:53Z
POI name: Anthropological Survey of india
POI types: amenity-townhall
#CoMaps android 2025.12.28-2-FDroid

Unable to answer "Is there a waste basket at this stop?" – Birlok Bus Stand (Bus Stop) – node/12446942948 via StreetComplete_ee 59.2:

Please check