Don't know. But anamorphic is far less appealing on a 16:9 or 17:9 sensor than it is on a 4:3 sensor. Anamorphic makes sense on a GH5, but not so much sense on wider sensors.
When I shoot anamorphic with my EVA1, I know I have to finish in 2K because I'll be doing a 2.39:1 center extraction from the 3.56:1 image you get from a 16x9 / 17x9 sensor area. But even so, I love the results. These are from a short film my wife and I shot a few weekends ago. EVA1, Kowa B&H 2x anamorphic, Voigtlander 40mm f/2 taking lens.
It would be nice if the camera offered desqueeze for monitoring. Right now I use my SmallHD 702 or Odyssey 7Q+ because they both do a 2x desqueeze AND punch in to 2.39:1 center crop so I can see my intended framing.