Hi Col0, thank you for posting in Apple Support Communities.
I do hope the above link has helped resolve your question.
Can I also suggest another option and that is to create a 'Shortcut' to turn your Switch Control off and on.
Shortcuts is explained in the following link:
https://support.apple.com/en-au/guide/shortcuts/welcome/ios
When creating a Shortcut to turn Switch Control off and on it may default to 'Turn Switch Control On'.
Simply select 'Turn...' and change it to 'Toggle' and that way after saving the Shortcut to your Home Page, when you select the shortcut it toggles between turning Switch Control off and on.
I use the 'Toggle...' option for a number of Shortcuts including turning off and on Assistive Touch, Bluetooth Headphones...
Hope this helps.