Just solve-it with a system call from the app with.
xprop -name "MainWindow" -format _NET_WM_STRUT_PARTIAL 32c -set _NET_WM_STRUT_PARTIAL "0, 340, 0, 0, 0, 0, 0, 1440, 0, 0, 0, 0"
I did figure _NET_WM_STRUT_PARTIAL
left=0;
right=340; // space used by the dock on the right hand side of the...