Currently there is no way to customize the email sent to users who authenticate via email (deep ?) link. I understand / accept the rational for this.

For Firebase projects with multiple Apps, this leads to all authentication emails having a single title (and link) based on the "public-facing name" set in "Project settings". It would be good to have an option to use the "app nickname" used for each of the Apps within the project to form the basis for the email title + link text. This would give users more confidence that they've received a valid login email and are not being phished.

Many thanks