Maybe a better question for the "fitting your bike" forum.
Standing over ht is very important. You don't want to smash your stuff when you dismount. Look at one of the frame size spec sheets for all the factors involved. Standover ht is not adjustable. Top tube length can be changed with changing the stem. But that will change the fore/aft balance of the bike. That can be adjusted with moving the saddle fore/aft. But that changes the seat to BB horizontal dimension, also the reach. All this affects the bike's handling. Some people care about it, some don't. If it bothers you change it. Does it bother you yet? I'm curious why you asked unless it is an issue for you?