This is my #1 biggest feature request for all map apps. I would also like to select a start and endpoint and search for anything along any of the possible route

This is my #1 biggest feature request for all map apps. I would also like to select a start and endpoint and search for anything along any of the possible routes. I need to go from X to Y but I'd like to stop for ice cream along the way back - what are the best routes that have ice cream shops near them, and which ice cream shops are they?