You can bridge audio from any ALSA application into your chosen audio system (including PulseAudio) It’s fairly easy to do and requires a loopback device, no explicit support in Renoise is needed.
A long time ago I posted a quick explanation of this; it still applies and here’s a link to the original post:
https://forum.renoise.com/t/renoise-linux-and-pulseaudio/39275
In my case, I don’t use PulseAudio at all, just ALSA. So I use this to allow Renoise to share the ALSA ‘dmix’ device with all the other applications on the system.