Yes Tamron confirms “it has a plan” to make Nikon Z mount lenses
In a recently released Dpreview interview Tamron said this confirmed they are working on makin Z-mount autofocus lenses:
Yes, we’re also looking at that area. We have to do a lot of research and development into the reverse engineering, because they don’t disclose the details of their systems, so it’s a really hard job for us.