This is a Mapbox style (a combination of vector sources and a map stylesheets), not a tileset or a raster layer. I believe the only way it could be displayed in the platform would be by allowing switching the basemap style, which isn't supported at the moment.
Mapbox has a "Outdoor" style which includes topographic lines:
This is a Mapbox style (a combination of vector sources and a map stylesheets), not a tileset or a raster layer. I believe the only way it could be displayed in the platform would be by allowing switching the basemap style, which isn't supported at the moment.