No means for copying / injecting. Instead, you have to select all walls that you want to change (Edit > Find & Select can help here) - and then open the Settings dialog. The changes you make will affect all selected walls. So, if all you change is the material, all that will be changed in all of those walls will be the material - thickness, height, etc will remain.
One of the forum moderators
AC 27 USA and earlier • macOS Ventura 13.6.6, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB