Difficulties with htaccess file and links (blocking 12345.html)?

Question

htaccess

There is such a .htaccess file (see below), apparently it is configured to display links like
xxx.com/?p=17000
in the address bar and load the _p=17000.html file from the root
Now I'm trying to put the 12345.html file in the root and type it in the address bar and takes me to the main page. Please help me set up htaccess so that it loads any files. But at the same time, the setting indicated above did not suffer.
#AddDefaultCharset UTF-8
DirectorySlash Off
# important!
# Options -MultiViews
RewriteEngine On
RewriteRule ^robots.txt$ - [L]
RewriteRule ^sitemap.xml$ - [L]
RewriteCond %{REQUEST_FILENAME} !/_routing.php$
RewriteCond %{REQUEST_FILENAME} !\.\S+$ [OR ]
RewriteRule ^(.*)$ _routing\.php\?$1 [QSA,L]