been receiving a hundred or more requests per minute for 22hrs+, so the traffic is there

Still an issue

What is the issue? put a WAF in front if you want to block requests.

The lack of metrics

Not talking about WAF or request blocking

No error rate metrics available

Request error rate metrics will appear here once your service receives traffic

other services show metrics just fine, but the linked one doesn't

Still an issue, redeploying to see if it fixes

Fixed it, how strange