Unable to answer "Do you have to pay to use this restroom?" – Restroom – osm.org/node/9992504779 via StreetComplete 58.2:

It's free for the campsite's customers

Unable to answer "What’s the height of the curbs at this crossing?" for osm.org/node/9290323606 via StreetComplete 55.1:

Travaux en cours T6
Road work in progress for T6

Attached photo(s):
https://westnordost.de/p/188253.jpg

Unable to answer "Are these opening hours still correct?" for osm.org/node/6221619681 via StreetComplete 55.1:

Not written