Redirect from www to non-www does not work. Works only on from http to https WP.?

Question

htaccess

Hello! There was a problem redirecting to a site without www.
Tried using the REDIRECTION plugin. Specified in the plugin settings Remove www from domain and Force a redirect from HTTP to HTTPS. As a result, only a redirect from http to https works. Moreover, if I create a redirect from www.example.ru/primer to www.example.ru/eda in this plugin, then it does not work, but if I redirect from example.ru/primer to example.ru/eda, then everything is fine .
In the .htaccess file I wrote:

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

The result is the same.
Tell me, please, what is the problem.