I was not yet aware of the development to tag systematically sidewalks parallel to streets. I am happy to help if there are some guidelines/tutorials on how to do it best.

The levure tram platform is not part of the side walk, but the levure bus platform is. I guess written guidance is really needed to make it all consistent.

StreetComplete offers many quests for sidewalks that cover only a few meter and I wonder if this could not be avoided by tagging differently (do the same with less paths/nodes).