Hello,
We don't generally add the name of relations that something is part of to the something itself, so for example here https://www.openstreetmap.org/way/1315609958/history would only be called that if that was the name of this stretch of path on the ground.
Different maps show different things, and if one wants to show running route relations it can.
There are quite a few of these - see https://overpass-turbo.eu/s/1UCF - maybe have a look at some of those have been mapped?
Best Regards,
Andy


https://www.openstreetmap.org/relation/18046447