Thanks so much for the recommendations!
One more although @Cementimental suggestion of Berna is great is ppooll (there’s a lines thread about it too).
There’s quite a few modules (“acts” in ppooll-speak) that are good for looping sections of audio and a flexible routing for fx etc.
I’ve repaired an older Macbook for a separate creative software need so I’ll be excited to try some of these MacOS-only options!
Thanks again for the ideas.