iCloud+'s Hide My Email generates random aliases but provides no way to organize or track them after creation.
A native Mac app could sync with the iCloud API to let users tag aliases, set expiration dates, and see which services each forwards to.
Privacy-focused professionals already paying for iCloud+ would buy this as a one-time purchase to reduce identity leakage.
First version could simply display all aliases with basic search and notes.
Risk is Apple eventually building this natively.