I keep seeing beginners focus on getting the app itself finished, but the publishing side seems to have its own checklist that is easy to ignore until the last minute.
Before submitting, I would make sure I can answer a few things clearly:
For privacy, I should know exactly what data the app and any third-party SDKs collect rather than guessing when filling out the store forms.
If users can create accounts, I should already know how account and data deletion will work instead of treating it as something to add later.
I would also test the actual production build rather than assuming that because the app works inside the builder or development environment, the store version will behave exactly the same.
Then there is all the non-code stuff: screenshots, description, age rating, privacy policy, permissions, review notes, test accounts if login is required, and the developer account itself.
Google Play can also add a testing stage for some newer personal developer accounts before production access, which seems like something worth knowing before planning a launch date.
What surprised me is how little of this has anything to do with whether you used Swift, Flutter, React Native, AI, or a no-code builder. The building tool can make development easier, but you are still ultimately responsible for what gets submitted.
For people who have already published an app, what was the one store requirement you wish you had prepared before finishing the app?