TikTok Live Music Streaming Fix

I need help getting audio from my Mackie PROFX10v3 mixer to my M-Caster Live Portable Interface and then into the Video Camera and TikTok on my Android phone. I'm currently using 2 ¼ inch plugs from Control or Main outputs of my mixer to a 3.5 mm plug(stereo mini plug) which plugs into the M-Caster Live Portable Interface Instrument/Line Input Input jack (Channel 2).
From the M-Caster interface 1/8 inch line level output Smartphone Jack(Channel 3A) I run a 4 pole TRRS cable(male to male) which connects to a 3.5 mm female jack to USB-C plug which goes in the Samsung S26 USB-C jack.
When I had a good balanced audio coming out of the interface (the audio from the headphones was perfect) the audio that was recorded on the Video Camera had the vocal super loud and the background tracks and other instruments barely audible. On Tiktok I didn't hear the audio from the interface
Requirements:
- Expertise in live streaming setups
- Familiarity with M-Caster Live and Android devices
- Problem-solving skills for audio routing issues

Ideal Skills:
- Experience with TikTok live audio setups
- Knowledge of audio interfaces and cable connections