I'm working on a group project and we are trying to upload our flutter app to the Google Play Console. The other day, I finished all the processes for submitting the app and now we are waiting for the app approved. However, the app we submitted as the app bundle before doesn't have much functionality. But, one of our MVP was uploading to Google Play, so we just submitted the app having a simple frontend with no functionality to the "internal test", because I thought our app doesn't have enough functionality to release as a closed or open test.
My first question is if it says "pending publication", does it mean they are in the reviewing process and I should just wait for a few days? Another question is is it ok to update our app bundle while they are reviewing our app (since the current app bundle doesn't have much functionality)? And when is the better time to update app bundle next and and how to update? Is it just hit remove in the picture below and drop a new file??



