My question is, why does the forum not have a feature that can allow members to reset their username easily, when ever they want.

My suggestion:

There should be a feature that can allow members to reset their username when they want, and after they have reset their username, let there be a backend data storage that will show that user "A" Was previously known as "XY" But has reset his username to "A" on the 8/02/2025.

My question or suggestion was not because I have any interest in changing my name, just curiosity.