This feature should be in all delivery apps

I always opt to come down irrespective of their age, it gives them time to rest on their bike.

As a basic humanity hygiene, tell them “you stay there, I’m coming down”. Not everything needs to be an app feature. Everyone has lifts in their houses and nobody is “that” busy.

What if they just ask customer the floor and whether there is lift present. If high floor and no lift, pick a younger rider