@Nicolas Van Saberhagen if openoms pulled it off seed only, is the missing exit flow just ui work, or does each wallet have to build the whole package dance itself?

From what I've heard for example Cake wallet is just waiting for Breez SDK to add it then it's a simple matter of including it in the wallet UI. Supposedly it will be soon. Not sure about wallets that use other Spark implementations but I'm guessing it's a similar reason they don't have it yet either.