If you are ready to verify your Help Center custom domain with Route53 AWS, here is what you need to do:
First, you need to go to settings and set up your custom domain in there. Check this article on how to do it.
Then, once you set up your custom Help Center domain (for example docs.yourprojectdomain.com ), then set your Help Center to "Active" and click on "Save settings" button. You will see the yellow message under custom domain: "We are deploying your SSL certificate, hang on, it will take around 20 minutes".
After setting up settings in Customerly, go to the AWS account.
Then click on "create new record" button on the Records page.
Click on "Create records" once done.
In about 20- 30 minutes, the record will be verified, and you will see it on the settings page.