Slight inaccuracy (but not in a way that impacts security, so relax!):
The code has support already in place for coin flip entropy but there is no UI flow for it yet.
Users are limited to:
* Picking bip39 words out of a bowl and using the Calc Final Word feature.
* Dice rolls (50 or 99, strictly enforced)
* Image entropy
There IS a PR for coin flips, but it went stale at the end of last year. I very much want to revive it now, but there are some UI tweaks it's going to need.
