Raspberry Pi OS has been through a big update recently, which fans of the little devices need to be aware of for future setups and upgrades.
First, in the name of security, the default "pi" user is no more. Why? Well, attacks are on the rise, and since the RPi is incredibly popular, it is obviously a target. Removing the default name is just another small barrier that anyone doing something naughty has to overcome, as they might now need your username directly too. That, and new legislation from some countries that forbid having default login info. Seems like a sane change regardless, so their install wizard (that's now required to use) was upgraded to create a proper user account.
On top of that, hassles of Bluetooth during setup should be a thing of the past. Now, it will tell you to set your devices into pairing mode and sync them up.
As for the future: say hello to Wayland. Everywhere it is beginning to replace X and the Raspberry Pi OS has been making preparations on that front too. They switched to mutter to help with this, and now you can also test out a very experimental version of RPi OS on Wayland (but they don't recommend it yet), with many features not yet hooked up fully or at all. Plenty of it is also running under XWayland, so it's not a "pure" Wayland implementation of the desktop.