How to create a redirect rule from all domain pages except the main page?

Question

HTML

Hello!
Can you suggest how to create a rule so that all site users who have NOT visited the main page of the site are moved to a similar page on a different domain.

Example:
The user goes to site.ru , he stays on the page.
If he went from somewhere to the address site.ru/page.html, then he is transferred to site2.ru/page.html

Answer 1

RewriteEngine On
RewriteCond %{REQUEST_URI} !=/
RewriteRule (.*) https://site2.ru/$1 [R=301,L]