Have you considered just absorbing the AWS bits yourself and not worrying your users with it?
We use Render because we have zero interest in devops and especially zero interest in AWS. Perhaps the customers you are targeting are also looking to leave AWS behind and not worry about that stuff.
AWS offers a lot of flexibility, it's a lot cheaper than PaaS providers like Heroku and even Render and it provides massive discounts specially to startups or if you pay upfront.
However, it's complicated and time consuming and I want to help teams to just focus on building the product rather than dealing with all the headaches of infrastructure set up.