I found an old laptop with a similar GPU and also have ~10 fps, but I found a quick solution
in game switch to 854x480 windowed
in file
C:\Users\[username]\AppData\Local\CaveBlackout\Saved\Config\WindowsNoEditor\GameUserSettings.ini
repleace:[ScalabilityGroups] sg.ResolutionQuality=80.000000 sg.ViewDistanceQuality=0 sg.AntiAliasingQuality=0 sg.ShadowQuality=0 sg.PostProcessQuality=0 sg.TextureQuality=0 sg.EffectsQuality=0 sg.FoliageQuality=0 sg.ShadingQuality=0
This trick should also work in other games made in Unreal engine