Preventing user from clicking custom made buttons

Hello, I have a number of slides in which I created "groups" and then triggered them to show different layers when the user clicks on them. I thought I would be able to change their state to "disabled" but the groups I created are not listed under "Objects" when I attempt to change their state. Is there any other work around that can help me disable these buttons while the audio is playing on the base slide? I've attached a slide showing an example. Thank you for any guidance.

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