I have eight iPhones (different models from the 3GS to the 11 Pro Max). To which are you referring?Drop down your model and battery health, as well as cycle count.
Not all iPhones can display cycle counts. Download COCONUT BATTERY on your MAC and plug in your iPhone via USB cable. CB provides cycle count and other interesting info like battery make and manufacture date etc. When CC hits 1,000-1,200 C, that's when things go downhill.Not sure where to find cycle count: do I need a third-party app for it? But I'm guessing it's somewhere around 1000-1200 based on charging most days.