A cloud-based identity and access management service for securing user authentication and resource access
Thank you for posting your query on Microsoft Q&A. As per your query you want to know if you could rename IdentityExperienceFramework & ProxyIdentityExperienceFramework to MyApp1_IdentityExperienceFramework & MyApp1_ProxyIdentityExperienceFramework and use for sign up sign in enginee.
Please do correct me if this is not the case by responding in the comments section.
Azure AD B2C requires you to register two applications that it uses to sign up and sign in users with local accounts: IdentityExperienceFramework, a web API, and ProxyIdentityExperienceFramework, a native app with delegated permission to the IdentityExperienceFramework app. Renaming the application should not be an issue as the applications are called during signup signin via client id.
Thanks,
Akshay Kaushik
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