Not answering your question, but…
When you say Level 1 isn’t keeping up with your 30-40 miles a day, I know the Level 1 charger my Ioniq 5 came with has a setting to switch between 6A, 8A, 10A, and 12A. Make sure you’ve set yours to 12A as this should net you ~1.1kW after losses. That should get you 40miles of charge in 10-12 hours.
What part of the world are you in to be charged those gregarious electricity rates??! Holy fuck that’s expensive.