Impossible to change the styles of the user interface

I just installed version 3.569 as of October 20, 2023 on an RPi 3B (not B+) and I see that it is not possible to set the UI style to “classic” or “contemporary”.
Only “manifest” mode is possible.
I have another system with RPi4 which works perfectly and it is possible to change the different styles.
Are you aware of this problem? How can it be solved?

thanks and regards,

WOW! Tricky but it works! Thank you!