Fat fingers, anemic fingers, and dry fingers have all given me trouble with touch sensitive screens over the years. This article goes into a bit more detail:
https://www.gabefender.com/writing/touch-screens-dont-work-for-everyone
In short, the phone isn’t mis-calibrated, your finger is likely not electrically connecting with the screen enough (or where you expect).
Try putting some hand lotion on, working in a warm room, drinking more water, or massaging your hands to increase the blood flow and moisture in your finger tip. Pressing less hard can also help as a smaller area of your finger is touching the screen (and may feel more predictable).
Finally try typing very slowly (and gently) to see if you can accurately hit each letter on the keyboard - and when a letter is not recognized correctly, backspace and try again. Over time our bodies develop a proprioception of where are fingers are, but with age (and changes in body fat levels) this proprioception may become a little off (and we can take a long time to notice because of how well autocorrect works) - doing a small amount of typing “alignment” practice can help the brain regain this accurate sense of location (and make the phone feel much more responsive to your touch).
Hope this helps!