I cant find the software update option on my note9 one ui Exenos
It should be at the bottom of the settings list. It is labled System updates.
I have this problem too, i wish i could help, i dont even know 😐
It should be on the bottom of settings.
Click settings > scroll down to software updates and click. It'll only check once every 24 hours. If it hesitates, it's looking. If it just blinks, wait a while.