If a device requires extraordinary measures most people cannot or will not take in order to "unbrick" it, then it's possible for the usage to be correct even if such a procedure exists.

For example - years ago, NVIDIA got in some hot water over some of their mobile GPUs getting so toasty some of the solder points broke, leading to bricked systems. If you were the adventurous sort, you could heat the laptop enough to reflow the solder and end up with an unbricked system, but that's not an approach most people are going to take.

Anything can be recovered with enough effort, technical knowhow and the right equipment. The distinction is what can be realistically repaired. Generally the term “unbricking” only exists because people overuse the term “bricked” (eg a phone stuck in a boot cycle isn’t a “brick”, it’s just “stuck in a boot cycle”. However if you do manage to fix a device by specialist hardware repairs then yes, I think it’s fair to say you’ve “unbricked” it.

The term "undead" also exists but if a person is currently alive it implies they were never really dead to begin with.