Is it possible to use Signal without revealing my phone number to others?

I'm personally using the Signal app on Android, but of course it applies to all versions, desktop and mobile.

With Telegram for example, I can pick a username and then share that username. And people can contact me with just that username. No phone numbers involved. Is something like that possible with Signal as well? Or do I *have* to give my phone number when asking someone to contact me on Signal?

I realize I have to use my phone at least once to register with Signal itself, and setup an account. But once I've done that, I wish to contact other Signal users, or have other Signal users contact me, without revealing my phone number to them.