How to replace custom url old domain to new domain with .htaccess

Since the domains point to the same server, you would need to do something like the following using mod_rewrite at the top of the root .htaccess file:

RewriteEngine On

RewriteCond %{HTTP_HOST} ^(www\.)?olddomain\.com [NC]
RewriteRule ^20\d\d/\d\d/[a-z-]+-(\d+)\.html$ https://sub.newdomain.com/$1-2/ [R=301,L]

I've assumed the data-raid part of the URL-path can consist of any sequence of 1 or more of a-z (lowercase) or - (hyphen) characters only. If this is always literally data-raid (as per your examples) then replace [a-z-]+ accordingly in the regex.

The $1 backreference contains the digit sequence immediately before the .html at the end of the URL-path. In other words, the contents of the captured subpattern (\d+).

You should test first with a 302 (temporary) redirect to avoid potential caching issues.

Reference:

• https://httpd.apache.org/docs/2.4/mod/mod_rewrite.html