It depends on what you searching for
There main quality gauges can be set here:
And you get it from here:
Which you can get from GEngine:
AS for bloom i don’t know i find this but not know where to use it:
Bloom is part of post processing which are invlidualy set, so you need to search in that direction
Alternaticly as you refrence console commands you can set console cvars via ConsoleManager:
And you can get console manager from anywhere in UE4 via this function:
IConsoleManager::Get()
Here API refrence to whole Console Manager: