After my body buried is my ‘free will’ out there still?

It seems like a detour farfetched
to pass through earthly life until bust
then hauled in a shiny hearse stretched
as “ashes to ashes, dust to dust”

For what’s a mortuary
but a somber treadmill?
and what’s a cemetery
but a solemn landfill?

After burial is It still
out there bungling it, my ‘free will?

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-free will = here: the alleged power of acting without the constraint of necessity or fate. Know how to check whether we possess it or not?