Hi @AM Dev-Test
I don't see anything about Microsoft retiring WebJobs any time soon from their documentation. From what you have told us, you already have an Azure App Service plan, which is a good start.
I think the reason why you are asking yourself this question is because you might have seen the term Azure Functions used. Perhaps you want to investigate this route as it is much more feature rich and is serverless -- which could significantly lower your costs.
Learn more about Azure Functions:
https://learn.microsoft.com/en-us/azure/azure-functions/functions-overview
Timer trigger for Azure Functions:
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If this is helpful please accept answer.