How to remove the slash on the main page?

Question

htaccess

Guys, I can’t set up a redirect site on WordPress by removing the slash on the main page.

Tried it does not help

RewriteCond %{THE_REQUEST} ^[^?]+/
RewriteRule (.*) /$1 [R=301,L]

It seems that this one works but without the slash then there is a numerous redirect

RewriteEngine on
RewriteCond %{QUERY_STRING} ^$
RewriteRule ^$ https://site.ru/ ? [R=301,L]