Question: How to get fieldplot or gradplot for a function in spherical coordinates

A warm greeting for everyone

I have a function in one variable r defined in spherical coordinates f(r)=r^2+1.
I want to getting field plot or gradient plot for this function in spherical coordinates: 0<r<1,  0<theta<Pi/2 and 0<phi<2Pi.
is there any suggestion

Amr

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