Even with .Net ... on small to even medium-ish scale, you can deploy a couple Dokku nodes, deploy to all three, set them behind a load balancer and use the host

Even with .Net ... on small to even medium-ish scale, you can deploy a couple Dokku nodes, deploy to all three, set them behind a load balancer and use the hosted PostgreSQL + replica. This can handle a lot of load with minimal startup cost and scale relatively easily on almost any mid-tier provider at a lot less cost. You can still deploy with Github actions, still have redundancy on the front end and pay a couple hundred a month vs. many hundreds or thousands.