In the physical sense, certainly yes, in the philosophical sense, maybe also and whether in the metaphysical sense, I don’t know.

Since we are composed of carbon, oxygen and water, it would be possible to extract these elements from the body and use them, for example, in combustion or nuclear fusion.

The maximum amount of energy that could be used from us is not small — according to Einstein’s equation E = mc², it would be possible to obtain energy during annihilation that would be enough to make 10 cups of coffee/tea a day for all of humanity for 1 year.

Philosophically, I would see it as it depends on each of us how we live our lives and what we accomplish and quite possibly we will succeed in accomplishing something beneficial that saves the work of others.

Metaphysically, which means extrasensory, we cannot determine this within the framework of physical laws.

In physics, we verify statements by measuring but so far it has not been possible (and quite possibly will never be possible) to determine whether a person has a soul and what it actually is.

If we had something like this and it should remain behind us, it would have to be one or more of the basic forms of force action.

There are 4 forms of force action (strong and weak nuclear force, electromagnetism and gravity).

I dare to exclude nuclear forces — they act at very small distances (up to the diameter of the nucleus of an atom).

We are able to detect the remaining forces quite accurately and we have not registered yet any difference before and after the death of a person.

So I would presume to remark that anyone who would like to have something left behind should, in my opinion, live their life meaningfully rather than rely on a soul remaining behind.