Street cardinal directions are a bit messy in greater Los Angeles. But I think generally in the city of Burbank it looks like there are typically cardinal directions? It might be helpful to link the exact location, if you don’t mind.
But more broadly, if the direction appears in a business’s website, then that’s pretty strong supporting evidence that it should be there. Another resource that can support the case is finding the address on the LA County Assessor’s site: Los Angeles County Assessor Portal, or on the TIGER road overlay. It could certainly be that the current OSM road is just missing it.