Yes, tracking quiz completions under the described setup is achievable. Here's the plan to implement it:
Step 1: Enable Google Analytics (GA) Integration with Type form

    Integrate Type form with GA:
    In the Type form settings, enable Google Analytics integration. You'll need your GA tracking ID (GA4 Property).
    Track Quiz Completions:
    Set up an event in GA for the final step of the quiz (e.g., a thank-you message or submission confirmation page). This event will signify quiz completion.

Step 2: Configure Google Tag Manager (GTM)

    Set up GTM:
    Ensure GTM is installed on your website, including the quiz page.
    Track Events via GTM:
    Create a tag to track the quiz completion event triggered by Type form.
        Configure a custom Event Tag in GTM.
        Use the Type form event (e.g., quiz_completed) as the trigger.
    Debug and Test:
    Use GTM’s Preview Mode to ensure the event fires correctly on quiz completion.

Step 3: Send Event to Facebook Pixel

    Link GA and Facebook Pixel:
    In GTM, create a Facebook Pixel Tag triggered by the quiz completion event.
    Set Event Parameters:
    Define a custom Facebook event like Complete Quiz or use a standard event like Lead.
    Test Facebook Event:
    Verify the event in Facebook's Event Manager to confirm it's tracked correctly.

Step 4: Verify Cross-Domain Tracking for Stripe

Since the quiz redirects users to Stripe, configure cross-domain tracking in GA to track users seamlessly:

    Enable cross-domain tracking between your site and Stripe to preserve session data.
    Use GA4's measurement ID or Universal Analytics' property settings for this integration.

Step 5: Final Testing

    Test the entire workflow:
        User completes the quiz.
        GA logs the completion event.
        Facebook Pixel tracks the event as Complete Quiz or Lead.
    Verify data consistency in GA and Facebook.

Outcome:
When implemented correctly, you will see quiz completion events in both Google Analytics and Facebook Ads Manager, enabling you to optimize your marketing efforts effectively.

If you'd like to proceed, I can guide you through the steps in detail or handle the implementation for you.