Hey all,
Late to the party, but as of October 2024, you should be able to change both the display name (the one that shows up on the mobile device) and the store name.
If you're using Xcode, the display name is under Identity->Display Name.
As for the store name, you can change that in Apple Store Connect. Its under General->App Information-> Localizable Information -> Name. If the name is locked, just create a new version, you'll have to resubmit for review.
Hope that helps.