How to disable empty referrers in .htaccess but allow search bots?

Question

htaccess

So, the task is as follows:

All direct visits to the site should be blocked, i. these are visits with an empty referrer. I do it like this:

RewriteEngine on 
RewriteCond %{HTTP_REFERER} ^$ 
RewriteRule^- [F,L]

Everything works correctly, except that in addition to direct visits, search bots are also blocked, which I cannot do. Please, tell me, using the example of one bot, how this can be written in .htaccess.

Answer 1

Search bots specify the From header.

RewriteCond %{HTTP_REFERER} ^$
RewriteCond %{HTTP:FROM} !(googlebot|yandex)
RewriteRule ^ - [F]

Answer 2

But what if the referrer -Policy of the site from which they are redirecting prohibits the transfer of referrers? Then the browser will not transmit this header, and your site will block the visitor. Why such discrimination? And how will it save from an attacker who can easily forge the Referrer header?