Usernames are now rolling out to everyone using Signal version 7.0!
Telegram had this for a long time. Why is Signal always behind on privacy features?
I would say Signal should not be slow on the things they are proud the most. SimpleX still better on this.
Try putting a Signal username and a SimpleX username in the same bio and see which one fits
SimpleX all the way. For apps with phone number required I prefer Telegram.