As I understood, the infrastructure is the same, but some projects run successfully and some do not.
Intuition tells me that the problem is in the project itself, in the dependencies. For example, environment variables, configurations, network restrictions, etc.
In order to identify the issue please take logs and if still unclear please share the error logs we will try to resolve the issue. Here article about logging in to Azure App Service: Azure App Service Logging: How to Monitor Your Web Apps in Real-TimePlease accept answer if it was helpful