HELP ME PLEASE

I HAVE VOSTRO 3578 AND IT HAS AMD 520 MY PROBLEM IS WHENEVER I DO ANY GRAPHIC WORK ONLY INTEGRATED INTEL UHD 620 WORKS I UPDATED MY DRIVERS TO ADRENALINE 2019 BY OFFICIAL AMD WEBSITE BUT STILL ONLY 620 IS WORKING I EVEN TRIED ADDING GAMES CHANGING GLOBAL SETTINGS BUT NOTHING HAPPENED I CHECKED ON YT BUT THE YT GUYS HAVE DIFFERENT SETTINGS I USE TASK MANAGER PERFORMANCE OPTION TO CHEAK WHERE GPU1 WHICH IS AMD SHOWS BLANK GRAPH AND NO MEMORY USES AT ALL I PLAYED IGI TO CHEAK BUT NOTHING HAPPENED PLEASE REPLY