You can create URL patterns for a RUM check, and assign those patterns to specific groups so that you can track the various URLs from your site. If there is a listing for “Unmatched URLs”, the URLs Uptime.com monitored did not have a specific URL prefix.
To resolve this issue, navigate to Reports > Real User Monitoring. You may view your report and download the raw data into a CSV file. This file will provide you with the URLs that have been captured, which you can add as RUM URL Patterns.