DJI has put a "Ronin-SC Camera Compatibility List" online at "https://dl.djicdn.com/downloads...". I myself own a Panasonic DC-G9. Although it is explicitly included in this list, the gimbal worked with the cables supplied, but only rudimentarily. I was only able to access the full range of functions (via the app) after I bought an extra cable for quite a bit of money.
1x Ronin-SC gimbal
1x BG18 handle with built-in battery
1x extension / tripod
1x quick release plate
1x camera holder
1x smartphone holder
1x Lens support
2x 8-pin connector cover
2x spanner
3x Camera screw 1/4"-20
4x M4 screw
1x Multi-camera control cable (Multi-USB)
1x Multi-camera control cable (type C)
1x USB cable type C
1x Multi-camera control adapter (Type C to Micro-USB)
1x Carrying case
In terms of weight, it should fit, but the shape is rather problematic. The gimbal comes with a USB-C to C and a USB-C to USB-B micro. My tip: borrow the Gibal from a photo shop like Zumstein beforehand. That way you can test it and then still buy it here without frustration ;-)
Apart from the fact that I don't have a Sony, but if it is listed in the compatibility list, it should also work. Provided it has the right cable, it should be included.
You can't zoom with it because it needs an internal zoom lens. As soon as you zoom, the weight shifts to the front or back and the balance is lost.
What I don't like about this Dji Ronin-SC is the balancing of the horizontal and vertical axis, because there is only one locking screw. However, once it is well balanced, it does what it is supposed to do.
The Ronin is designed for a weight of up to 2 kg. The total load of the Nikon with the lens is therefore rather borderline. I can balance my Fujifilm XT4 with 18-135 mm zoom lens (weight 1.2 kg) just at the rear stop of the mounting plate. In my opinion, however, it makes little sense to use a gimbal with a fixed telephoto lens. Lenses in the wide-angle or 80 mm range make more sense. These lenses are correspondingly shorter and lighter. If the combination with the 135 mm lens is still to be used, then I would leave out the 'elevation plate' included by Ronin when mounting the camera (if this is not already the case anyway) and buy another mounting plate with counterweights. Just google: Ronin quick release plate with counterweights. I don't have any experience with this, but from what I've read it should solve the problem.
The battery is integrated in the handle and is charged via USB. If the capacity is not enough, you can buy an extra battery/grip: Dji Ronin-SC BG18 Grip (mount)