Dead tooth - home custom tray whitening? I want to whiten all of my teeth. (Photo)

Hello everyone, So my front left tooth is dead, it used to be a lot greyer (no photos sorry). I had it internally bleached about 4 years ago, unfortunately there’s a slight grey cast returning. Here’s my issue, I want to whiten all of my teeth and I’ve been told home whitening trays are good (by a dentist) if I got this and separately whitened my dead tooth would this work? Then I can whiten all of my teeth, an internal bleaching is expensive and my all my teeth need whitening anyway.