Add fields to SEO Tab

Questions
1

Is it possible to add fields under SEO tab on a page template?
Litium version: 7

2

What is your use case? Maybe we can figure out other solution.

3

I need to add a field to define HTTP status code for the page.
Now, we have added it along with other fields. But it will look good, if it is under SEO tab for a page

4

Unfortunately there is no support for that at the moment.