Proton Pass:
When searching viewing Aliases in the GUI, there could be more useful statistics in the "More Info" properties of each Alias entry, such as amount of logins that are using that alias and even perhaps amount of emails received onto that alias.

Additionally both items could be "hyperlinks" to a specific search filter, a copy to clipboard on click, which you could then either paste to Proton Mail search and view those emails, or get search results for all of those logins in the Proton Pass app it self.