@justin-calareso to test this screen, you can always select preview on your theme to see if it would work if needed.
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Then select the "Confirmation required" screen. Notice how I put "Alex did this" on this confirmation.
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One of the easiest ways to try this out is to use Passwordless login. As you can see in the Theme I have the confirmation page example set which I added <h1>Confirmation page example</h1>
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Now when I log in to the application I am presented with the option for "Login with magic link"
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This will email me a link which I can open in a new private window (or different browser not already logged into the application).
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Once I open this in the new window you will see that the confirmation required has my H1 tag showing "Confirmation page example".
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I hope this helps.