You followed the steps in the How to Change an App Name article and can see your changes in BiznessApps and other search engines but when you search the Apple Store you cannot find the app under its new name.
You may notice the changes appearing in BiznessApps and search providers before the changes are visible when searching the Apple Store - even though the app is "ready for work" and you have an app store connect URL where you can see it. This is due to the way Apple re-indexes its search engine for the Apple Store. Re-indexing is done nightly, which may cause a delay of up to 24 hours in your app's ability to be found when searching the Apple Store. If it has been more than 24 hours and your app still cannot be found when searching the Apple Store, you will need to contact Apple Support for assistance as this is an issue with their search engine.