No. "what it means for something to be" is, for Heidegger, merely "ontic being", which he was not interested in. Instead, Hedigger was interesested in "ontological being", or "the being of Being".
Now, what "the being of Being" is, is itself the subject of a multi-hundred page unfinished book of what is widely considered to be some of the most difficult writing in all of philosophy.
Because Heidegger's writing is so difficult and so open to interpretation (and re-interpretation), many philosophers disagree strongly about what he actually meant.
For example, what "Being" itself is, for Heidegger, is one of the biggest points of contention. The entire field of Christian Existentialism[1] crystalized around interpreting Heidegger's "Being" as God. But many other philosophers don't interpret it theistically at all.
His other essays outside of Being and Time are equally difficult to understand and open to interpretation. This includes "The Question Concerning Technology", and I'd caution strongly against taking any one summary or interpretation of it as gospel or the final word on the subject.
[1] - https://en.wikipedia.org/wiki/Christian_existentialism