Thank you Lorenzo for the support!
I wanted to update the thread because I found the source of my error. I initially started with changing my keyframe frequency, but that didn’t help me send concurrent streams.
When you said everything looks fine and I’m likely receiving data, it got me thinking that the data receiving was not the issue at all. I was getting an automatic “hangup” message from Janus for connections made after my initial successful one (ie. from another computer). Anyways, what I realized was that my RTP_PORT_RANGE was not configured correctly.
I thought RTP_PORT_RANGE was only present in janus.plugin.streaming.jcfg, but I realized it was also in janus.jcfg. I think at some point I must have edited either just one or both thinking that it was the same thing (careless cmd+F on my end). Anyways, this following post helped quite a bit:
Hopefully this helps people in the future!