You want a professional-grade mixer: If you won't settle for less than the professional audio quality of the best streamers, this is what you need. You're considering a GO:XLR: With support ...
Using Eurorack to process external audio offers a huge range of possibilities over pedals ... along with the two outputs from Z-DSP. A mixer works just fine too but a VCA offers extra modulation ...
That means there are improvements to low-light photography, the option to adjust camera flash strength, better MIDI app support ... ability to search for song audio with Circle to Search, AI ...