Missing data on Web vitals page

Problem

I'm not seeing data in Web vitals.

Here are some causes of missing data:

Your filters are too narrow. Some key attributes are only relevant to certain web vitals. For example, if you filtered by elementID, data would only populate for largest contentful paint (LCP) because elementID is only applicable to measuring LCP.
Your browser agent or edition doesn’t collect certain data. To learn about what key attributes the New Relic browser agent collects, see the browser agent data dictionary.
Your app can’t send PageViewTiming data to New Relic. Web vitals is built on PageViewTiming data, so if for some reason your app is unable to send ingest to our collector, data may not appear.