Please add tip option to app!!!

I never carry cash and most people dont these days. My husband is the only Uber driver in our very small tourist town. Please add the option to tip after your ride is completed! It doesnt have to be mandatory but an option would be great! Hes had so many clients ride with him that dont have cash who want to tip him and they forget Uber app doesnt allow it like the Lyft app does. Thank you.

Ljr44 about Uber, v3.239.4