Most of the time, yes, with an honest scope. Welded brackets can be cut off and the surface ground smooth, custom mounts can be removed, and frame extensions can be cut back. Whether the equipment looks identical to original after reversal depends on how visible the modification was.
If reversibility matters for resale or warranty, tell us up front and we’ll design the modification to be cleanly removable. Sometimes that means bolted attachment instead of fully welded, which we can do.