SharePoint List Form (Native) Formatting

Without using Power Apps, is there a way to use JSON so that a Multi-line field can be displayed the full width of the page instead of a small column. Also, for longer content can the "show more" be defaulted to expanded.

I was trying to use sections which is working but when the [UpdateContent] is in one section it is displayed 2-3 inches wide, but we want to use the full width of the page, so it is easier for staff to read. 

I did try using the header/footer for this one filed but it also displays HTLM tags from the multi-line fields. Tried both Enhanced and Rich Text options.

Also is there a way to remove/hide the [Content Type] from the Edit form or all forms?

This is what I started with for the Body:

{
    "sections": [
        {
            "displayname": "Client",
            "fields": [
                "Title",
                "Category",
                "Expires",
                "Delivery Method",
                "wf_TechUpdateAlerts",
                "MultiLine001",
                "TextLong001",
                "Target Audience"
            ]
        },
        {
            "displayname": "Details",
            "fields": [
                "Update Content"
            ]
        }
    ]
}