Please create the option to have alias phone numbers in addition to alias email addresses and have them connected to each other if the user wants to.

So for example, if you have 15 email aliases each assigned to a separate website login, then also have the option to add alias phone numbers that can be attached to the alias email addresses. The phone numbers could be a VoIP number and can be used for text, calls, and 2FA and keep them on the Proton browser/email app so the user can check them anytime.