Nope, they still require a number.
From their site:
Requiring phone numbers in Signal lets people see which of their friends they can easily talk to on Signal while limiting the potential for spam within the app.
There are options to spoof a number in the States, and probably some areas of th EU, but many other places are SOL.
Bringing your voter information card with a driver’s license or any other Canadian Gov’t issued card with photo, name and address is like having a FastPass for voting.