Ah, no. As soon as another Reliver of myself is created, the arm will be restored. Dahut has been nagging me to get started on the process...

[he will just use himself as an example, because it's relevant]

You asked about genetics, correct? Same principle. If you are born with two arms, the Reliver body will grant you two arms once the process begins, even if you lost both during the course of your life. Injury and deformations gained over the course of life are healed, whether that be limb loss, burns, scars, whatever it is.