Unable to answer "What’s the surface here?" – Path – way/739701160 via StreetComplete 63.0:

There is no road or path here!

Attached photo(s):
https://streetcomplete.app/p/338298.jpg

Unable to answer "Is drinking water freely available for guests here?" – Okains bay campground (Campground) – way/662235890 via StreetComplete 63.0:

drinking_water=conditional
Water needs to be boiled for 3 minutes on the whole campground.

Attached photo(s):
https://streetcomplete.app/p/338315.jpg

Unable to answer "Is drinking water freely available for guests here?" – Okains Bay (Campground) – node/1650925934 via StreetComplete 63.0:

Not drinkable until boiled for three minutes.

Attached photo(s):
https://streetcomplete.app/p/338299.jpg

Unable to answer "What are the opening hours here?" – Diamond Harbour medical centre (Doctor) – way/320487311 via StreetComplete 58.2:

Under construction.

Many buildings in this area are not in the map. Is there a public resource to implement them?

via StreetComplete 58.2

Unable to answer "Who is allowed to park here? Parking may be free or paid." – Parking Lot – way/863243629 via StreetComplete 58.2:

Parking at the roadside of Beach Road is public.
Parking next to the Surf Lifesaving Club is private (Lifeguards only)

Unable to answer "Does this bench have a backrest?" – Bench – node/12179240088 via StreetComplete 58.2:

Teilweise

Attached photo(s):
https://westnordost.de/p/240041.jpg

Unable to answer "Does this bench have a backrest?" – Bench – node/12179280763 via StreetComplete 58.2:

Teilweise

Attached photo(s):
https://westnordost.de/p/240042.jpg

Unable to answer "Do you need to pay to enter here?" – Historic Cape Light museum (Museum) – node/6501457712 via StreetComplete 58.2:

Admission by donation.

Here is a sign, the purpose is historical information

via StreetComplete 58.2

Attached photo(s):
https://westnordost.de/p/232759.jpg