Hi @lcastillo-ledger - the ERC-7730 integration is the clear-signing anchor in ERC-8265 (Prepared Transaction Envelope), now on Magicians and at PR review: thread 28557, ethereum/ERCs#1753.
§5.7 routes envelope-level decoded calldata through ERC-7730: each evm-tx content slot carries either a decoderRef URI pointing to an ERC-7730 descriptor on the Clear Signing Alliance registry, or an inline clearSigning block conforming to the ERC-7730 schema for offline wallets that cannot resolve URIs. (The inline variant is the producer-side answer to registry-binding cases like the EIP-7702 delegation @wenzhenxiang raises above.)
10 minutes of your read on §5.7 if you have it: is decoderRef-or-inline the integration shape Ledger wants here, or would you prefer inline-only so the registry stays the canonical fetch path? Either answer simplifies §5.7. Happy to fold any feedback into PR #1753.