Something is wrong with the SCT relation. On CyclOSM, OpenCycleMap tiles, and OsmAnd vector it is missing the purple highlight which signifies a regional route. On Waymarked Trails Cycling it's missing the SCT flare. It renders like a plain cycleway without any route relation.

See note/5338779 (duplicating this here for visibility) Also, Waymarked Trails Hiking shows both SCT and NCT flares just fine.