[help] unreal engine problem

For all Unreal engine games fortnite squad ark etc. i have this problem where if i try to go into fullscreen 1920x1080 it forces a res like - 1440x900 and makes it impossible to click.
Over the last month ive tried to find a fix to this on youtube google searches.
I’ve tried numerous things from tweaking nvidia settings to .ini and monitor settings?
Has anyone got a fix to this?