Everyone’s hair has a different life span. I.e the length each strand of hair will grow before it falls. If your hair is at a length that is getting beyond your average hairs life span you will see more split ends. Everyone’s hair was well overdue a haircut over lockdown period and may just need a really good chunk off the length to tidy it up and get that bounce back.
Its impossible to rid your hair if split ends with a haircut, there will always be some of course and if your hair is weakened by highlights or straightening irons etc then this will cause more split ends throughout your hair at any length not just the ends. A few hair treatments can help also using serums/hair protecting styling products when styling. Sometimes a change in shampoo/conditioner or hardness in your water can make split ends more obvious too.