Oh, yeah, but who can blame them because writing JSON Schema files by hand is some onoz
Ironically (in the context of this submission) Bitnami has a "--schema" option to their README generator, which is why so many of their charts ship with .schema.json files: https://github.com/bitnami/readme-generator-for-helm/tree/2....
There are likely other "give me a schema for this example JSON/YAML file" but almost certainly wouldn't come with the nice {"description":""} blocks, nor the {"required":false} that an annotated .yaml can offer
While digging up that link, I also spotted the tag line in their GitHub org which is hilarious https://github.com/bitnami#:~:text=trusted%20by%20ops