Hey #elixir peeps. Please tell me about what you're using for an LSP and formatter?

I'm using #helixEditor with elixir_ls. I assumed elixir_ls was also the formatter as well (aren't most LSPs also formatters?)

But it wasn't formatting. I've read to use mix.. which seems to work, but also seems to have a different opinion on syntax and lags a bit.

Just curious what the standard way to do this is