defaults write com.apple.WindowManager GloballyEnabled -bool [True/False]
Adjusts whether Stage Manager is enabled or not.
defaults write com.apple.WindowManager AutoHide -bool [True/False]
Adjusts auto hide behavior. This option controls the "Show Recent Apps" and "Hide Recent Apps" GUI option.
defaults write com.apple.WindowManager AutoHideOverlapThreshold -int [-2147483647...2147483647]
Unsure what this option does. Should be noted that when AutoHide is set to False and this option is set to -17 or lower Stage Manager behaves as if AutoHide is set to True.
defaults write com.apple.WindowManager LeftStripMaximumRowCount -int [-2147483647...2147483647]