How to navigate to a non-wordpress page in a wordpress install without getting a 404 error?

If you are using the standard htaccess file (below), any non-WP page will be displayed before the WP htaccess lines are executed. This is because the standard htaccess file checks for ‘not a file’ and ‘not a directory’ to redirect to the WP content.

Standard htaccess file below (see https://wordpress.org/documentation/article/htaccess/)

# BEGIN WordPress

RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

# END WordPress

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