Try it. The link I shared has commands for custom sizing. See what the engine can do itself on your setup.
If it doesn’t work you can try the scene render approach. You just have to remove vignetting from the PP first. And oversample each shot by 30% so that you can stitch it together without problems. (Obvisouly wind nodes or anything moving needs to be stopped).
Again, so long as each individual shot can render with your gfx and you save the file out you won’t have issues.
I would create a bluetility script to pan the camera the preset amounts and capture the still. Then save the render texture manually, and click the bluetility to have it move and capture the next tile.
Afterwards assemble in photoshop. The panoramic stitching will probably help with that.