This page does not show the linters that are disabled (with a badge): https://megalinter.io/latest/supported-linters

You have to go to the specific page: https://megalinter.io/latest/descriptors/json_eslint_plugin_jsonc/

And check for:

This linter has been disabled in this version

For usability it is difficult to see what is happening.

I suggest a PR that on the first page adds one more badge for which you would have to simply edit this function:

I can create the PR.