I have both US and Canadian Apple Store accounts. Logged in with my Canadian account, I got the same error message. So I logged out and then in with my US account. The US app store shows me the app with an "update" button but when I click on the update button I get the message " "
Shop Disney" No Longer Available; the developer has removed this app from the App Store".
The version it shows is 6.0.1 which is 1 month old.
I wonder if there is a temporary problem due to IOS 13 and them having a problem with the compatible version ?
Maybe someone who has only a US apple account can try and see what they get.
SW