No, it still doesn’t work properly in “unlit” mode. Maybe the mouse sensitivity drops sometimes. But it is still unrealistic to draw on the landscape.
Maybe the developers are aware of this problem, which is why they do not answer such questions in the forum.
However, this problem is definitely related to the interaction of the engine with Mac, because if you try to install a virtual machine and install Win + UE5 on your Mac, you will notice that drawing on the landscape is very comfortable and there are no problems with mouse speed that appear in the engine compiled for Mac.
I came to the conclusion that only the developers can fix the problem. But a very big question to them is why they have not done it yet. This is a very small, but very annoying bug for designers.