Wood: reuse vs landfill same results

Hello,

i am comparing the results of a structure made of wood.
I am surprised looking at the results.
Scenario 0 envisions the wood incineration
Scenario 1 envisions the reuse of wood as material
Scenario 2 envisions the landfill of wood

Why are there the same results?

I expected that reusing wood involves less CO2 emissions.

Looking forward to hearing from you.
Thanks in advance.