301 redirect from every page of one domain to the same address of another?

Question

htaccess

Hello! How to make a 301 redirect from each page of one domain to the same address of another?
Only the domain has changed, nothing else (example: it was https://tosmer.od.ua/ became https://tosmer.ua/ ).
I found this option:

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

Everything works. I just don't know if this option can be used.
PS: (Site on Bitrix).

Answer 1

RewriteCond %{HTTP_HOST} ^www\.site1\.ru$ [NC]
RewriteRule ^(.*)$ https://site2.ru/$1 [R=301,L]