In the dialogue box that opens, it will say Sign Out.You can now sign back in using a different Apple ID.At the bottom of the screen tap Sign Out of Store.This is the sneaky place Apple hides the Sign Out setting in iOS 14. In the dialogue box that opens, click on the little blue person icon in the top left corner.This is the first item in the list, will say Your Name, AppleID, iCloud, etc. Here’s how you sign in/out of the AppStore on iOS 14 (and this works for iOS 15 as well). Apple does not make this obvious, but here’s you can sign out and sign in with a different ID on iOS 14. If you have different user accounts for iCloud and a different one for the AppStore such as you need accounts in multiple countries (expats), or you have a separate personal and work iTunes account (privacy), you might be struggling to sign in and out of the accounts on iOS 14.
With Apple iOS 14 releasing on Sept 16th in the US, they have made further changes to the way the Apple ID is both used, accessed, and controlled. If you find this helpful and want to say thanks, please buy me a coffee or buy my book on Amazon (it has nothing to do with technology). Important I am not affiliated with Apple and this is my personal experience.