I’d just use the system color palette. I would be surprised if users confuse your design with Activity.

The “Live” label looks like a Claudism. For the rest, you should be fine when you use the semantic fonts + size presets provided by Apple. They also set decent values for tracking depending on size and will react to global a11y size settings.

I will definitely look into these improvements, especially the fonts and the "live" badge. For the colors, I'm unsure; I played around a lot with those already and quite used to them by now, but who knows. Thank you for your detailed feedback and the specific suggestions!