In Plasma system settings, workspace behaviour, virtual desktops when you click the button to add a new desktop, it will add a new desktop called "New Desktop" rather than "Desktop <n+1>" as it used to be in past. In particular, since I am using the Italian translated version, I get "Nuovo Desktop". Plasma 5.22.4 KDE Frameworks 5.85.0 Qt 5.15.2
Can confirm.
*** This bug has been marked as a duplicate of bug 410366 ***