Apple improved the battery life notably last year with the iPhone 11 Pro, and you’ll get roughly the same endurance from the new model largely due to the addition of 5G and larger display.
iOS 14.5 includes an update where the battery health reporting system will recalibrate maximum battery capacity* and peak performance capability on iPhone 11, iPhone 11 Pro and iPhone 11 Pro Max to address inaccurate estimates of battery health reporting for some users. Symptoms of this bug include unexpected battery drain behaviour or, in aCz1H.