because of the lack of support from pubg team for android devices, never mind and don't bother even my S9+ exynos support HDR i got the temporarily solution and its 100% safe you can go to play store and download GFX tool Here is a link: https://play.google.com/store/apps/details?id=eu.tsoml.graphicssettings and adjust whatever settings you want (HDR) and don't think about your account getting banned, that will never happen
