Make the `WALLY_TX_ISSUANCE_FLAG` more usable?

I was trying to serialize to hex a transaction that includes an issuance in one input using `wally_tx_to_hex`, and I couldn't see the issuance data in the output when I read it with elements-cli `decoderawtransaction`. I noticed there was a `WALLY_TX_ISSUANCE_FLAG` that needed be added to the `utxo_index` in the input that contains an issuance, and now I can see the issuance details.
Is there any plan to make it more usable, for example using an explicit argument in function like `wally_tx_add_elements_raw_input`? Or even better could it be implicit from the presence of a nonce or en entropy in the input?
No matter what I suggest to document it briefly in the man, I can propose something if needed.