Hello,
This is a known issue and track here: https://github.com/microsoft/BotFramework-Composer/issues/8283
A work around mentioned in that thread is, create manually the application on Azure AD, save the App ID and Secret value, go to your bot resource group and create an Azure Bot (since Bot channels are deprecated) and use the App info. After that, import only the App information using composer publishing profile and save, edit the profile and choose create new resources and the wizard will take care of the rest.
Regards,
Yutong