I don't know that we can characterise this as a "transfer"; it's a pure digital product, shot with DSLRs on special camera rigs that would photograph each pose twice, shifting the camera on the second shot to create the desired interaxial for 3D.
Missing Link was released theatrically through United Artists Releasing, which is a joint venture between MGM and Annapurna [previously called Mirror]. This would explain the Fox release, as it came out on disc and digital on 23 June 2019. As far as I know there is no 3D disc release of Missing...
Missing Link was part of the Annapurna/MGM joint releasing venture previously known as Mirror and now known as United Artists Releasing. While some of those titles were released by Fox, after the Fox/Disney merger, it's very much on a case by case basis, with some going to Universal and some...