Sun sign astrology is the stereotypes of each sign. One it is just a generalization so it’s sure to fall flat, and two, the Sun is not the only celestial object used by astrologers, nor were all celestial objects in the same sign as the sum when any one of us was born.
Jupiter is representative of the god of fortune, luck, expansion and excess. And Libra the archetype of balance, partnership, beauty, and indecision. But, the areas of one’s life that this will be activated in, and how one response to this activation is so nuanced and specified