allow to split stereo channel to mono

i use the bluetooth and the stereo1 input for backing tracks. would be nice to be able to split those channels (and the usb) to mono and be able for example to send the left channel(click track) just to the aux and the right to lr

There are two ways to seperate backing an click to L and R
1.) Send STin to Out1 and BT to Out2 Without linking but using them as a Stereo Pair
2.) The FADER tab allows you to pan all inputs, including STin and BT, left or right.

I’ll explain better
I’m sending the backing tracks from a phone/tablet via Bluetooth using a normal music player app
the tracks are as common for backing tracks click track on the left and track on the right
so i would like to be able to use the Bluetooth and usb tracks splitted as two mono tracks or as a stereo like it is now.
to do this now i have to use two aux exit with two cables and enter again in two channels (loosing two aux and two inputs)

bluetooth left /usb left → tracks (goes to foh)
Bluetooth right / usb right → click/cues (goes to in ear aux)

Just a thought
This might be a Bluetooth device restriction as most work in Stereo pairs. Can you send and receive Bluetooth streams as dual mono on devices? I’ll have to look to see if any of my BT headphones have a Pan control.
Latency for click tempos might also be an issue over Bluetooth.

Update.
Just looked at my audio midi setup on my Mac and I see my AirPods Max format are 2 ch 32bit float 48 and i can switch them to a mono summed configuration or switch off L or R, so might be possible to send a dual mono signal.

that is what I was asking
would be possible to have the bluetooth, ST1 and usb inputs (that are now only stereo) to be configured as dual mono?
so for example now usb is channel 19/20 from the usb I would like to have the possibility to split the two channels and have 19 and 20 with separate faders/sends to the auxes
or ST1 to be able to route the left input to a but and the right to another one with a different fader
Otherwise now I have for backing track I need to use two mono channels “loosing” two mic pres