If you don't have apps like Facebook, Instagram, and other social media, then consider charging the battery to 80% only. Get an app, Accubattery, it chimes once the charge reaches to 80%. You can also track battery life on this app.
At a times, Pixel will give you a suggestion to stop some apps as it runs in the background hogging battery. Allow Pixel to do what it is telling you.
If you are tech verse, root the phone (very easy method, loads of videos on YouTube) and install Battery charge limiter app, it will limit charge automatically.
But first I would limit charging and check every app that is on the phone. I have Pixel XL, easily runs for a day.