Unable to post content to strapi which is more than 1 MB in size

Can you also try to add textLimit:

module.exports = {
  // ...
  settings: {
    parser: {
      // ...
      formLimit: '10mb', // modify here limit of the form body
      jsonLimit: '10mb', // modify here limit of the JSON body
      textLimit: '10mb', // modify here limit of the text body
      formidable: {
        maxFileSize: 100 * 1024 * 1024, // multipart data, modify here limit of uploaded file size
      },
    },
  },
};

Parser middleware uses the koa-body module, so all these options from parser are passed to it. You can view all available options here:

koa-body also uses formidable for form-data content(file uploads), you can view all it’s available options here: