iOS external mixing into Focusrite 4i4 3rd gen?

Trying to do something awfully specific here. Does anyone know if this is possible?

Search yields that external into a class compliant mixer works. I’m trying to get two decks in stereo to a 4i4, and then take that and route it into a non class compliant mixer. Would be a lot easier than using two ipads in single deck mode and manually beatmatching everything. Thoughts and experiences?

No experience with that particular interface, but it should work fine.

Here’s an example of my multi-channel USB setup.