Since Night Mode is supported in S10 series..
Will Samsung bring Astrophotography like Google Pixel and iPhone XI through software update?
in pro mode you can take a shot of 30 second long so this is the result. so may be it is possible through software updates
even if we set up a tripod and put it on 30 secs.. it doesn't give good results like in iphone or pixel.. galaxy's pic is quite grainy with respect to those devices...
let's just wait for the update
really can't answer that here... you'll have to ask Samsung officials