Jason Brown has a look into using For Each Loops in Bifrost.
VFX Artist Jason Brown (Val Hallen) is the hero we needed for learning Bifrost in Maya. In his last few tutorials, Brown covered using Bifrost to re-create some Houdini-style nodes. This new covers what seems to be a stumbling block for most new users, and that is using For Each Loops.
Jason Brown has a Patreon where he shows off Bifrost coding and other Bifrost stuff too.
You can download all of Brown’s Bifrost Compounds here.
