In France, "a country with better social protection than the US", apps ask for a tip too.

In the Uber app it shows up after the trip / rating. I think the options are +1, +2, +5. Maybe there's a custom, I don't remember.

However, what surprises me, is that for example on Uber Eats, they ask for the tip before the delivery, at the end of the order. The way I see it, even in the US, the tip is supposed to at least take into account the quality of service. How can you judge that before you've been served?