You’ll need to set up Google Search Console to use the report. If you haven’t used Google Search Console, it’s well worth your time to get it set up. Very, very well worth your time.
Search Console will give you access to tons of Google’s internal information about your site, including whether Google views it as a good experience for users, how much you’re showing up in (not just getting traffic from) search, and much more.
Ask your dev team how they’re preparing for this page experience shift. Send them a link to the Page Experience report and ask them if it’s pointing out any unforeseen avenues for optimization.