It is about unlisted, but existing inputs of Plugins, which are not listed in Cubase. Btw. these inputs are listed in DAW-Competitors without any problems.
It seems to be, that this topic (bug) exists for some time and still is existing in Cubase Version 14.0.20.
Sorry, but all we Cubase users are have to deal with this inconvenience for now.
And I agree mixer and audio routing and additions for a logical preset management urgently needs a 2025 refresh and a lot more freedom for power users.
I know the intentions behind those track classes, but it was only bringing benefits to some users which really don’t like to take care of signal flow. (So mostly not the pro ones )