Sorry but how is ride share problem a TSP problem? Rides are assigned one at a time and I do not think they would take into account future rides while doing the assignment optimization.
Not my industry, but imagining that they accept rides within a 48 hour windows from now. You’d quickly get something somewhat similar to a TSP. But given that you have lots of additional constraints (people tend to have a clear idea when they want to get from A to B) compared to the classical TSP, it might actually be easier to solve. As those constraints limit the paths you must evaluate.
There’s a difference between the algorithms ride shares have to use and the heuristic based solution for 85.6k cities.
The graph for ride shares is constantly changing as passengers request rides from random starting points to random destinations.
This version of TSP is much harder to solve.