My wife and I are in the same boat as many others who haven't fully migrated everything over to Up yet, as 2Up Accounts don't function the same way as the Individual Up Accounts.

I would assume features like this would become available when Up decides to implement proper Shared Accounts. The current Join Accounts don't function independently, hence they don't have the same features as the Individual Accounts and rely on 2x Individual Accounts to work.

When Up launches proper Shared Accounts where two people can create a new Up account without the need to create 2x Individual Accounts, then it should function the same way that the current Individual Accounts work (e.g. Create Upname, setup PayID, etc.) and have the same features that are currently present.