I’m afraid not.
This is due to the way the core routing has been designed with dedicated FX sends and returns, so you will need to use (not waste!) a mix to route audio out and an input (or mix external in) to return it.
It may seem like a negative, but it’s actually the other way around! The more basic (in terms of routing and processing) dedicated FX sends and returns were added so you wouldn’t need to use up ‘full fat’ mix and input channels for the internal FX.
Hi @sokaisija
I do use internal FX sends to send mixes into my outboard FX Rack (PC with Live Prof) .
You need to assign the FX send you want (ex FX1) to a rack you’ll be able to bypass or leave unprocessed (ex rack n°1) (in my case, I use the deesser, set to no deessing at all). Then in the I/O page, you just have to route the rack n°1 output to a physical output of the console (XLR, jack, USB or whatever) and you’re done, FX1 bus will go straight into the output you’ve chosen. you just need to send your outboard gear back to a stereo input of the console.