Ok. This should work:
open terminal:
(ctrl+alt+t)
enter command:
micro .config/kwinrc
Then change
BorderlessMaximizedWindows=true
To
BorderlessMaximizedWindows=false
press ctrl+s to save changes
press ctrl+q to exit editor
restart your system
Problem solved
please , awsome garuda devs make it easier for noobies to change in the settings instead of using terminal and editors
creddits for original answer to [zoeruda]
Alkl you have to do is open the file in a text editor, comment out the line, or change it from true to false, then reboot.