Thank you for posting this!
Reading Josh Meissner's article about the acquisition of bike route sharing app Komoot has reinforced the importance of promoting and fostering community-owned services.
I'm not sure how to reach the owners of the https://furtherheights.com/ instance of wanderer, but visiting their website results in a 1033 error. The next instance I tried (https://trails.tchncs.de/) works as expected, though!