Here's the Tweet that kicked off a Twitter thread where the branch in the repo was shared:

>Any developer who wants to try out the upcoming #miniscript support for #bitcoin on [@Ledger](https://Twitter.com/Ledger) hardware wallets, please checkout this branch:
>
> https://github.com/LedgerHQ/app-bitcoin-new/tree/experimental
>
> You'll need a Nano S or a Nano S+ to load the application, or alternatively you can use the Speculos emulator. 🧵

https://twitter.com/salvatoshi/status/1564598905551077377
https://nitter.it/salvatoshi/status/1564598905551077377