You have totally misunderstood the potential energy when an electrically charged object moves from one point to another point in an electric field.
Energy here is not any sort of kinetic energy which it can acquire, but it is the energy required to do the work of pushing or pulling the charged object from one point to another point in the electric field. It depends on the property of the charge of the object whether it is a repulsive force or attractive force on the object. It means that the repulsive or attractive force produced by the electronic field does the work of moving the object from the initial location $i$ to the final location f. In other words, provided energy = work, where the energy here is the electric potential energy in the electric field produced by the difference in the electric potential voltage between those two points in the electric field
$$W = -(U_f-U_i) = -q(V_f-V_i)$$
where $U_f-U_i$ is the change of the electric potential energy from the initial point $i$, the final point $f$, $q$ is the charge of the object, $V_f -V_i$ is the difference in the electric potential voltage between the initial point $i$ and the final point $f$ in the electric field.
There is not any kinetic nor potential energy gained by the moving charged object as the way how you have totally fundamentally misunderstood it here. Kinetic energy here is zero because before the charged object is moved by the electric force produced by the electric field, it is stationary ($V_i= 0$), and it stops at the final point ($V_f=0$) which means that $V_i=V_f$ or
$K_i = K_f= m(0)^2/2=0$ or $K_f-K_i = 0$
The electric potential energy provided by the repulsive or attractive force produced by the difference in magnitude of the electric field at those two different points with 2 different distances away from the source of charge which has set up the electric field here is used up to do the work of moving it from the initial point to the final point
The charged object can gain electric potential energy only when an external or applied force purposely moves it from an initial point either outside the electric field or in the electric field to another location nearer or closer to the charge source which sets up the electric field. It is similar to an object being at a higher altitude have a larger gravitational potential energy than when it is at a lower altitude from the Earth's surface. The difference here is the closer you purposely move the charged object to the source of the same charge as its charge, the more electric potential energy it will get to move a longer distance when released and repelled by the same charge of the charge source at the location closer to the charge source, and traveling a longer distance always means much more work done to make it move, and the work done is equal to the magnitude of the electric potential energy required to do the work, and the energy is provided by the electric field.