This is definitely not unique only to AWS but also GCP in my own experience. We sometimes had Sentry error alerts due to DB connection error coming from the web

This is definitely not unique only to AWS but also GCP in my own experience. We sometimes had Sentry error alerts due to DB connection error coming from the web app hundreds of times in a short window of 5 minutes and GCP dashboard would still shows green the entire time. Disclaimer: I have worked with GCP for 2 years and AWS for 8+ years.