Roughcast plaster, application on drywall panels, application on old plaster

hello we are having a spiral staircase installed, and I think when they cut the ceiling hole, the wall below in the apartment will be affected (textured plaster) since I can't plaster such a large area myself, the question is: can I simply screw drywall panels directly onto it? or would there need to be a battens construction underneath??? otherwise? can you apply textured plaster directly onto the old textured plaster again? otherwise I would just have the drywall panels smoothly plastered and then painted, or is that rather not recommended? although for the appearance I would then of course have to design the whole room accordingly.

It depends on the substrate. If the [UK] under the old wooden panel is flat, you can screw another [GKB] panel onto it. I would use a 9.5 mm panel here. I could also imagine that you can apply a new plaster over the old plaster, it depends on how firm the old plaster still is...