Currently, this is working as designed. While we're unable to edit the Business (CIPC) Reg. No. field, and un-bold the item section, you can import your own template.
To do that, make sure to enable the import style feature by following these steps:
Once done, you can download a sample template and manually edit the details. Add the Business Reg. No. and un-bold the items.
Here's a sample screenshot of what the template looks like:
I'm also adding these article to help you customize the template and import other templates:
If you need more help with the template process, please let me know in your reply. I'd be glad to help you out again. Take care!