How to confirm Early Hints is working

Hi Support,

I have activated the Early Hints option but cannot figure out whether it is really working or not.
When I check my site Network>> Header response, I find the following link information, which does not have a “preload” attribute anywhere. So I am confused and cannot understand whether the Early Hints feature is really working or not?

  1. link: https://www.homemade-circuits(dot)com/wp-json/; rel=“

  2. link: https://www.homemade-circuitsa(dot)com/wp-json/wp/v2/pages/67993; rel=“alternate”; type=“application/json”

  3. link: https://www.homemade-circuits(dot)com/; rel=shortlink

Your clarification would be greatly appreciated.