If you are really committed to the security of your WordPress there is a fantastic method to allow access to your Dashboard only from certain IPs. This method has only one restriction, and that is that authorized users must have a fixed IP, if it were dynamic you might even have problems accessing your own site in case your Internet provider changes your IP.
Now, getting it is really simple, you only have to modify the .htaccess file or create it if it does not exist.
Once you have it you only have to add the following code, replacing the xxx.xxx.xxx.xxx.xxx with your IP address:
Code language: PHP (php)
<Files wp-login.php> order deny,allow Deny from all # Whitelist your IP allow from xx.xxx.xx.xx # Whitelist other IP allow from xx.xxx.xx.xx </Files>