MilViz has shared some information regarding their aircraft compatibility with Prepar3D v5 back on June 7th 2020. The developer describes when we should expect the products updated and what will be updated.
The developer shared this piece of information through their Facebook page. The developer obviously talked about updating their aircraft because of Prepar3D v5 compatibility. However, we will have to wait for those updates until Lockheed Martin releases hotfix 2 for v5. Then, they can begin their work. This is due to some several changes to the simulator itself, which will influence the aircraft functionality and visuals. This is also why, for example, PMDG did not release 737NGXu for Prepar3D v5 at this time. MilViz developer expects that their updates will be unfortunately paid, this is based on the involved work. Products, which don’t have PBR at the moment, will get it when v5 updates will roll out.