On the Mac App Store page [1], I can see the settings panel in a screenshot. In General Settings / Onboarding, there is a toggle switch labelled:

"Show onboarding on first launch", with more text underneath

"Show first-run guide after installation"

I have no choice but to conclude that this app was vibe-coded from snout to tail.

[1] https://apps.apple.com/app/id6776577400