take a look at the Who's Hiring threads - despite the love the BEAM gets on this website, it seems very few folks are brave enough (or public enough) to hire Erlang/Elixir/Gleam/etc engineers. I've seen one or two Elixir jobs each posting and zero Erlang jobs in the last 6 months or so of Ctrl-F'ing the posts as I see them.
There's a pretty consistent stream of relatively senior postings on the elixir forums[1] as well as a number of successful large-scale elixir deploys (Discord, Heroku, etc) that probably do their own recruiting. I get the sense that YCombinator's technical mentorship focuses on language silos they have experience in, so this community is probably just a bit outside the "sweet spot" for BEAM hiring.
Hiring juniors (and getting work AS a junior I imagine) is a challenge. I don't think Elixir is that hard to learn (and has fewer foot-guns than many competitors), but it makes evaluation more difficult.
It sounds like Elixir might be a competitive advantage for attracting talent for the companies that do actually use it (much like python in the mid-2000s[0])
