Adding .php to a separate page?

Question

htaccess

Hello.
On WordPress, I want to limit the redirect to a separate page, it actually turned out to be a redirect, but it gives out a 404 page

RewriteRule ^catalog_02$ /catalog_02.php [R=301,L]

we add this page for sure .php displays a 404 page, a plugin is also installed that adds the .html format to all pages
Maybe the rule is not like that?

Answer 1

RewriteRule ^catalog_02$ /catalog_02.php [R=301,L]
Redirect and won't make a .php page for you, correctly throws an error.
But for a separate wordpressa page, it is unlikely to succeed. Although how to know.