Hi Jim,
When Nicecast went away I moved to Audio Hijack for the #ds106radio inspired Radio Edutalk.
It took a while to get my head round it but:
https://johnjohnston.info/blog/audio-hijack/
is a screenshot of my setting for broadcasting a skype call
As far as I remember I took only the right channel to my headphones to avoid hearing myself.
Oh and
https://apps.apple.com/gb/app/pocketstreamer/id1454181572
iOS app that I think should work with DS106 radio and is free,