Oh, boy. I have been talked into presenting at NashBitDevs this coming week. I have rust side project that uses Bitcoin Dev Kit. The code creates and broadcasts a transaction with two inputs and those inputs are from separate wallets.
repo: https://gitlab.com/bitcoin-pep/tui-rust-wallet
NashBitDevs: https://www.meetup.com/bitcoinpark/events/304457252/?utm_medium=referral&utm_campaign=share-btn_savedevents_share_modal&utm_source=link