It's in game store,add an app in game store,than run it,you will get option of screen recording

no brother...U Say "They Didn't mention that knox is available"...Ohk..now suppoz u have cow and u want to sall it than u describe my cow have 4 lags,2 eyes,2 ears...Definitely no because all know this..like this knox is the part of samsung devices s...

but generally all samsung phones have it,so it's not required to define..it's like they don't define cow have 4 lags

yes but samsung isn't described That "There is no knox in m31" on official site.

but they don't defined it on official site,also they not described that knox is unavailable in m31路‍♂️