Unable to answer "What kind of building is this?" for way/559312112 via StreetComplete 42.0:

This is the stairwell to the parking ramp.

Unable to answer "What surface does this piece of road have?" – Service Road – way/808649639 via StreetComplete 56.1:

Everything I can see is paved with concrete. However, the road does not go around the building.

Unable to answer "How are the footpath and bicycle path laid out here?" – Cycle Path – way/1190735334 via StreetComplete 58.2:

This is a multi-use path. Not a cycleway. Very likely, foot traffic even has the right of way. See the Michigan wiki for more information.
osm.wiki/Michigan

Unable to answer "What type of bicycle rental is this?" – Washington and Illinois (Bicycle Rental) – way/278552895 via StreetComplete 63.1:

I do not see rental bike parking here.

These are separate buildings.

via StreetComplete 53.0

Unable to answer "What kind of building is this?" for way/822390258 via StreetComplete 55.0:

More than one building.

Unable to answer "Is there a bench at this stop?" for node/6248422966 via StreetComplete 53.0:

There's a bus stop to the west but not here.

Many trails to be mapped. Here is the park's map. https://charltonparkorg.presencehost.net/file_download/inline/5c75da21-4da9-49e0-99bb-aa3a31449174

Unable to answer "Does this road have lane markings?" – Residential Road – way/789774190 via StreetComplete 62.2:

This is in a parking lot, it is not a residential road.

The offset must have been off on the imagery used to trace these buildings.