No, when you work on your app, all changes are reflected on the development version of the app, aka “myapp/version-test”.
For your last changes to be taken into account in the live version (aka the production version of your app, without the version-test part of your app url), you have to deploy your current development version in the live mode.

If you have added your Stripe keys in the development version of your app only, you have to deploy in production for all your changes and settings to be taken into account in the live mode.