I’m not sure what the taxi stand is. My understanding is that as of now only taxis can pull up to the arriving curb (if that is the taxi stand you mean). The location inside the parking lot is for everything that is not a taxi (Uber, Lyft, etc…). Ride services caught pulling up to the curb will get some sort of fine or ticket that must be big enough that none I have seen are risking it.
So a regular person that makes it to the arriving curb and calls a ride share. To get to their driver, they need to go back into the airport. Go up one floor. Cross the sky bridge to the parking structure. Go back down one floor. Then walk to the middle of that parking level to an area painted off and filled with grumpy people.