I'm using Remoter VNC on iPad pro with smart keyboard. The control, option, command keys on the physical keyboard don't work. But I get that, in most VNC apps I can't get those combo keys working from a physical keyboard. But when I open the software keyboard, I'm expecting to see only the bar with ctrl, option,cmd etc docked at the bottom, but the bar floats in the middle of the screen with a blank space below (presumably reserved for the software keyboard, which is not needed at this time since a physical keyboard is connected).
To be more accurate, the command/opt/ctrl keys in smart keyboard works in some cases but not some others. E.g. Cmd+s save will work, but cmd+v for paste will not work (probably because there is iOS level cmd+c cmd+v copy paste?) cmd, ctrl or option command with arrow keys never worked.