Ask HN: Application with on Cloud but with On-Prem Requirement

Hi HN! I am currently working to design an enterprise application. While we are relying on a lot of the cloud (AWS for now) technologies for the usual benefits including things like SQS, SNS, serverless, and more, we are also looking at a requirement of on-prem deployment since a lot of data is sensitive and customers in the initial discussions itself are talking about security data sensitivity.

What are some good options today to be able to make an application on a modern stack, while also managing enterprise customers' expectations on data security- whether on prem or private cloud?