  In this work we present the first measurements obtained by the V-band Doppler
reflectometer during the second operation phase of Wendelstein 7-X to discuss
the influence in the velocity shear layer and the radial electric field, E$_r$,
of several plasma parameters such as magnetic configuration, rotational
transform or degree of detachment. In the first place, we carry out a
systematic characterization of the turbulence rotation velocity profile in
order to describe the influence of density and heating power on E$_r$ under the
four most frequent magnetic configurations. The $|$E$_r|$ value in the edge is
found to increase with configurations featuring higher $\iota$, although this
does not apply for the high mirror configuration, KJM. As well, the E$_r$ value
in the SOL and the velocity shear near the separatrix are found to display a
clear dependence on heating power and density for all configurations. For a
number of relevant cases, these results are assessed by comparing them to
neoclassical predictions obtained from the codes DKES and KNOSOS, finding
generally good agreement with experimental results. Finally, the evolution of
E$_r$ at the edge is evaluated throughout the island-divertor detachment regime
achieved for the first time in the 2018 campaign. After detachment, $|$E$_r|$
is reduced both at the SOL and edge, and the plasma column shrinks, with the
shear layer seemingly moving radially inwards from the separatrix.
