Context: I have an Isochrone layer based on mapbox-gl-js and react-map-gl. There, I want to show some contour-labels on the contour-lines with some conditions. Please look at the shared image: isochrone image with labels

In the shared image, I have marked several contour-labels as "A" and some as "B". If you observe the contour-lines behind these contour-labels, you'll see that "B" labels have multiple lines intersecting beneath them whereas "A" labels have a single line (looks like a road).

Question: Now, I only want to show contour-labels at places where there's a single contour-line and NO intersection/overlapping of multiple contour-lines. Basically, I want only to show "A" points and hide "B" points. I would ideally, want to do this with Mapbox expressions without any custom logic related to geometries. Thank you a lot for helping.

More images for clarification: single line double line or line with intersection

Technicals:

• Contour-lines are a layer of type 'line'.
• Contour-labels are another layer in the same source of type 'symbol' (this was the suggested mechanism by Mapbox to show contour labels).
• Contour-polygons are another layer with the same source.