The schema used to extract the information is at https://github.com/SomeoneElseOSM/SomeoneElse-vector-extract/blob/main/resources/README_sve01.md . The map style is https://github.com/SomeoneElseOSM/SomeoneElse-vector-web-display/blob/main/resources/README_svwd01.md .
Documentation for both is ... as yet somewhat incomplete, but hopefully there's enough information there to show that doing this sort of thing really isn't that complicated.
It can be frustrating to see maps made with OSM data (by big companies that I won't link to here) that omit basic information - like hiking and cycling maps that don't say where you are and are not allowed to walk or cycle.
I suspect that the market for maps that show which pubs that have stone floors is a bit niche (i.e. me), but things like "can I get a wheelchair in" and "which hiking route goes through here" really aren't.