danieldegroot2
OSM-Carto, the default style, may ignore the layer tag on some objects, as it is very uncommon/unexpected usage of the tag.
See the layers menu on the right for more layers. Most other layers render this correctly.

Covered=yes on ways beneath bridges is optional and also controversial. Only the appropriate layer tags are needed, combined with a bridge or tunnel tag on one of the ways - both are already present.