@FlowTime1990 This looks good and properly grouped in different sections.
You cannot make further changes to Body layout using JSON formatting. However, you can make customization to form header, footer and columns.
Check below documentations for same:
- Configure the list form
- Use column formatting to customize SharePoint
You can get some ideas from PnP list formatting samples site, there are lot of existing samples available using JSON formatting: List Formatting Samples
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