Oblivion on Intel HD620

Hello there, I was wondering if you could help me with configuring Oblivion to work with shader model 3.0 shadowing on Intel integrated GPU. I cant get it to work, and my in-game graphics generally lack more complex shadows, cant enable grass shadows, character shadows, etc. Hardware I am using is a 2019 Dell Latitude 5400 laptop, with Core i5, 16GB RAM, Intel HD620 integrated graphics and Windows 11. Game is installed through Xbox Game Pass app. Tried edits to oblivion.ini file, swapping shaders files with no avail. I heard that some custom dlls might make the game think that it works with discrete GPU, cant find more info on that though. Generally the came doesnt support HD620 oficially and cuts on available graphical options. Could someone help? :)