I was in an interview once and the prospective employer asked me what church I attend. I replied, "Catholic." He said, "Is that even Christian?" So, yeah, plenty of Americans have a skewed view of Catholicism.
I had the opposite experience coming from Django/Flask to Elixir/Phoenix. I found it very comfortable and that there were many similar patterns at the framework level. Now, LiveView is a bit of a different story but basic Phoenix routing and views seem quite similar to Django routing and views. Ecto's model schemas have a decent amount of overlap with Django's model objects.
Was it the LiveView stuff that felt foreign? I'd agree there's a learning curve there as someone coming from Django.
I think your best bet is to catalog them (using LT if you like) and try to sell them as a single collection. If there are any that you identify as particular powerful, maybe sell them separately. What's going to kill you is the shipping for a single collection. Maybe offer a discount for a local sale and pick up.