[/Script/Engine.GarbageCollectionSettings]
r.EmitterSpawnRateScale=0
r.LightFunctionQuality=0
r.LightPropagationVolume=0
r.Shadow.MaxResolution=32
[/Script/Engine.LocalPlayer]
AspectRatioAxisConstraint=AspectRatio_MaintainYFOV
AspectRatioAxisConstraint=180
maybe create custom resolution like 1080x1080 with custom resolution utility and replace values in GameUserSettings.ini
ResolutionSizeX=1080
ResolutionSizeY=1080
LastUserConfirmedResolutionSizeX=1080
LastUserConfirmedResolutionSizeY=1080
FullscreenMode=0
LastConfirmedFullscreenMode=0
PreferredFullscreenMode=0