There is a notification. I have many of them, as I report people any time I find them breaking the rules. You will receive an email that states the following.
Subject: Your player report in Apex Legends helped us take action
Body: Hello,
Thanks for helping us keep our Apex Legends community positive, fun, fair, and safe for all.
The Positive Play Charter outlines the guidelines for playing, and we may place restrictions on an account and revoke access to certain or all EA Services. Sometimes, a suspension or ban is our way of preventing further disruptive behavior.
Whether you’re new to gaming or have been an active player for years, we appreciate your help to make this a community we all want to be part of.
EA Terms of Service