Xamarin or Unity, what to choose for a cross-platform application?

Question

Mobile development

Advise
It is necessary to make an application
According to the type of car order
But with visual accompaniment (smooth changes in the car, it is possible with explosions)
There is a choice of colors and interior trims
And after choosing, send an application with the specified characteristics for pre-order
And buying all kinds of accessories
With Xamarin it's cool that you can expand applications, due to many libraries, like the same work with the camera, etc.
But at the initial stage, the problem is due to XAML and working with Unity animation ,
everything is the other way around . but which will take more time?
Is it possible to make a payment for goods (all kinds of accessories) on Unity, via mobile
In general, what would you advise for this task

Answer 1

Is it possible to make payment for goods (any accessories) on Unity via mobile

Can.
But I would recommend leaving the choice of instrument to the performer.