That's pretty weird and indicates your phone or its touchscreen might be defective, you should get it looked at, because other than with old resistive touchscreen phones I've never had capacitive touchscreen phones need multiple presses.
I assume you're young? Finger capacitance can reduce quite significantly with age.
I've had multiple Apple touchscreen products. The same on all of them. Sometimes I have to lick my fingertip to get it to register.
Touchscreens need to be used in a specific way. Most people does it already instinctively, but it is very easy to do it wrong. E.g. if you try tap on a button, but you move your finger 2mm on the screen, that tap becomes a swipe, and nothing happens.
Try working with you hands for a living. Not all of us has warm, pliable, moist hands constantly.
I have Raynaud's which causes loss of circulation in my fingertips even when the weather isn't that cold (so even in a car with the heat on). Then this happens, touch screens do not register correctly, and I end up having to use a knuckle or do what my sister does and use the tip of the nose