Prebuilt pc to upgrade graphics card

So back in 2016 i bought a prebuilt pc just to browse internet at that time but once i started buying games for it, i realized i needed to upgrade my graphics card to play the games i want (overwatch and gta5 for example) but when i opened my pc, i realized that the graphics card is soldered in the mother board, so my question is there a way for me to add a decent graphics card for it? What are my options?