Overbridge as plugin in Logic Pro X

Hey there,
iam trying to record my Digitakt over overbridge in logic.
Why don’t I have a plugin to use on the instrument channel?
Why does it not show the channels to select on my extra audio tray?
Is it possible to use it parallel with an audio interface anyway?
I record one take and would love to integrate Digitakt of course for the reason of having 8 and not 1/2 channels of the recording of Digitakt.

_Hopefully someone can help!??