Heidegger on Transcendence and Phenomenology

I am always amazed how some very strong Heidegger scholars still get his ideas of transcendence absolutely WRONG!
It is ABSOLUTELY an existential concept
... and your mama probably thinks it is too.

Transcendence is a fundamental determination of the onotological structure of the Dasein. It belongs to the existentiality of existence. Transcendence is an existential concept.

It will turn out that intentionality is founded in the Dasein’s transcendence and is possible solely for this reason—that transcendence cannot conversely be explained in terms of intentionality. The task of bringing to light the Dasein’s existential constitution leads first of all to the twofold task, intrinsically one, of interpreting more radically the phenomena of intentionality and transcendence.

With this task—of bringing to view, along with the more original conception of intentionality and transcendence, a basic determination of the Dasein’s whole existence—we also run up against a central problem that has remained unknown to all previous philosophy and has involved it in remarkable, insoluble aporiai.

Martin Heidegger, The Basic Problems of Phenomenology, Albert Hofstadter, Trans.,
(Bloomington, IN: Indiana University Press, Revised Edition 1988), 162.