*Update*
New video where I tested the specifics of this. Unfortunately, the a7iv is upscaling a 1080 signal to output to 4k, not sending a true 4k signal for recording.
[ Ссылка ]
Is this a hack or workaround to record full-frame 4k60 from the Sony a7IV?
By setting the camera to 1080p 60fps but setting output resolution under HDMI Output Settings to 4k, it appears the camera will output a 4k signal but keep the full-frame fov.
