The first appears to be on the property of a single family private residence.
The rest seem possibly fine location wise but we need more information if you want community help. Are they trailmarker? If so then a picture with a geo tag on it would help get them reinstated.
For Wuppertaler Stadtwappen, what was this object? There is nothing visible on street view or apple maps:
For Vereinsheim since I can’t find any information online about it still operating after 2022 maybe someone reported it as closed? That’s just speculation though
And when it comes to the “Vereinsheim” we were recently there. Its still active, they meet weekly, but their online presence is perhaps not to much to talk about
Is this unique and the only one or is it one of many in the area? Things like this usually got removed when somone local notice that there are multiple of it and consider it not distinct
In Germany, the coat of arms of the city is often on the manhole covers in bigger cities as the waterwork companies are tied and even owned by the city. This is not distinct and should never have been approved anyways
There are multiple ways to do it. One of the easier ones is to use an app like gps map camera. It takes a picture and puts the location data on a watermark at the bottom.
