He's dead.
There is no way an octopus leg can save Bee.
They should update this page to indicate his death.
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Well thats a bold statement to say.
According to the actual manga though, killer bee should still be alive.(though in rough shape)
Here is why.
So far of the 7 jins who had bijuus extracted from them(9 if you include naruto and bee, though theirs were extracted differently), REQUIRED the jin to still be ALIVE.
ALSO, the jin ONLY died once ALL the bijuu was completely extracted.
If they were to die BEFORE all the bijuu was extracted, then the rest of the bijuu would "respawn" elsewhere.(as apparently happens to the bijuu when a jin dies)
The 8 tails tentacle that was cut, LITERALLY has ZERO REASONS why it would be cut off, if you do not consider it being cut off to save bee.
So since only a complete extraction kills the jin, gyuki, severed his tentacle that bee was in, so just his main body was seperated, thus leaving bee with just enough to survive.
The evidence based on most of the manga related to jins, points towards killer bee still being alive at least currently. Perhaps the severing of the tentacle, only delayed bees death, makeing him similar to uzumakis. But the evidence points towards bee surviving.
If you still disagree after my reasoning, then that is fine. You get to have your own opinion.
But thank you OP. You made me realize I should start makeing threads that I have been pushing to the back of my mind, and just being lazy.
Have a wonderful night!