Is .NET 4.8 and latest Amazon SDK usage sufficient to solve Amazon warning about discontinuing service?

For the past several months, I have been receiving Amazon emails that start with the following message:

“We are reaching out because there are TLS 1.0 or TLS 1.1 connections to Amazon Simple Storage Service (Amazon S3) objects hosted in your account. As AWS is updating the TLS configuration for all AWS API endpoints to a minimum of version TLS 1.2 [1], you must take action as soon as possible,” and so on…

My application accesses S3 services and is built using .NET 4.8. I recently upgraded the app to the latest version of the Amazon SDK. However, Amazon Tech support requires an account upgrade to answer technical questions, even if the question is caused by Amazon itself.

My question is: With .NET 4.8 and the latest SDK, am I protected from any service interruptions? If not, what steps should I take to ensure uninterrupted service?

Thank you!