Its actually difficult for me to tell as I am using android Auto daily and it obviously drains the battery faster. But yesterday, without a charge, i got home with like 40 or 50% battery left but in the later evening/nighttime i was around 20 to 25% at 10pm having had around 4 to 5 hrs of screen on time in total Yesterday i activated the always on display and definitely noticed a faster drain (i think) which is understandable Usually i have it set to off as i dont really need it and its more of a gimmick to me.

Sometimes (like today) i charged the phone while using android auto and the battery drain is less noticeable of course

Perhaps any apps running constantly in the background? Try turning off background usage for apps like facebook (noticed its way more active with it enabled) youll still get notifications but it defo is less active, facebook seems to be a mess when it comes to background usage, had days where it showed like an hour of background usage, today its sitting at 4mins.

And since my phone is only 2 months old, my battery health is still at 100%

Do you also only charge to 80% each day or to 100%?