Familiarize yourself with your company’s decision process on strategic decisions like this. Ensure you have a way to submit a proposal for a decision on making the change (or find someone who has that access to sponsor your proposal), build a business case that shows cost of opsec team, hardware and everything else is lower than AWS (or if cost is higher then some other business value is gained from making the change — currently digital sovereignty could be a strong argument if you are EU based).

If you cant build a positive business case then its not the correct move. Cash is king. Sadly.