It would be great if Strapi could be deployed as a serverless application, namely on AWS as a Lambda Function. It seems it might not be far off... I found this blog article that successfully deploys it in a serverless manner: https://blog.vikfand.com/posts/serverless-strapi-4-guide/
It splits the overall application into different frontend & backend parts. However, I would hesitate to run Strapi this way in production without official support, for fear that future updates might break something.