Hi! I'm adding the missing climbing tags to some items that are already on the map, or adding new crags and areas for those that are not. I'm adding the data from other public climbing sources. There are a lot of items in OSM that are missing the climbing tags, which were probably agreed-upon later.
With these tags, the items will appear on https://openclimbing.org/ or other renderers which have implemented the new tagging scheme (see Climbing on the wiki).
Ringkamp, here, I've added as a node. I usually add routes and group them into a Crag relation if I'm visiting the area.
If you know some more climbing areas/crags, please do get in touch with me. I'd be happy to add them to the map.
If you're into climbing, you can also add them yourself. I'd be happy to discuss anything about the tagging scheme for climbing as I'm quite interested to get more of it into OSM.