How to whitelist URL in Traffic Inspector and what are the implications

Hi, we have Traffic inspector turned on for our Prod WP site. We noticed recently that certain legitimate requests, notably links inside Pardot tracking emails, gets blocked on Traffic inspector. Each request is from individual IP our a guest on the website, so the IP’s cannot be whitelisted. When we check the cerber logs, we can see that request/ip get locked out as cerber assumes this is “Probing for vulnerable code”

We have 3 questions on this:

1. If we want to whitelist a URL on traffic inspector, say anything coming from example.test.com, what is the best way to do it? I read online that we can use the regex – {.*}, but not sure if that is the correct way to do it. Or should we use :: example.test.com/{.*} . I have tried to follow the example in https://wpcerber.com/wordpress-probing-for-vulnerable-php-code/
2. If we use the above regex {.*}, I believe it will allow any request based on the domain – example.test.com. Is there a chance that this will make the website less secure? That is, it will allow anyone trying to send malicious request to send to any url based on example.test.com?
3. Is this a known issue for Traffic inspector and Tracked links?