I stumbled across the public transport feature and it seems very cool :-)

AddisMapTransit recently did lots of Public Transport mapping in Addis Ababa, and the bus routes are not shown there for on OsmApp.

Example:

https://osmapp.org/node/11035607130#17.00/9.0107/38.7636

If I change the query to the simpler version

  const overpassQuery = `[out:csv(ref, colour; false; ';')];
  ${featureType}(${id});
    rel(bn)["route"~"bus|train|tram|subway|light_rail|ferry|monorail"];
    out;`;

it would work, as you can see in the following screenshot from localhost:

@Dlurak can you explain the query introduced here?
EDIT: actually you already did explain it in the PR - sorry for the noise.

Mapping Requirement:
It's important to note that for this enhancement to work, stops must be correctly mapped with the stop_area
relation. In cases where this mapping is not done accurately, the query will not find any routes at all.

So it might be a shortcoming in mapping in that area because the stop_area relation is not used.
I am not sure if this is a hard requirement in the public transport v2 mapping schema.

I also saw, that probably highway=bus_stop should be added to most of the stops, for rendering them on the map.

CC @alazar-tekle