I guess a bit of this goes into semantics...
"Approved" is not explicitly required, though it is hard to avoid if "control" is established...and there is no good reason to avoid "approved", and many good reasons to ensure it.
If a person makes revB available, and prohibits access to revA...I suppose that constitutes "approval" of revB.
A signature is not particularly required...but again that's down in the weeds and there are pretty good reasons to have a sig of some sort.
I would expect an auditor to look for evidence that revA is not being used, and that some control mechanism was in place to manage/prohibit the use of outdated WI/Proc/Specs. That (to me) is the purpose of control in this area (including posted instructions and lookup sheets).