Scattering Modeling: The DWBA was used as implemented in BornAgain29 to model the GISAXS, GISANS, and off‐specular scattering intensity using the same model with different instrument and material parameters. The specular neutron reflectivity data at T = 300 K (see Figure S1, Supporting Information), fitted using the GenX software,30 were used as a basis for the model generation. For more details about the used model see the Supporting Information and corresponding theoretical background in refs. 23, 30, 39, 40, 41, 42.