Samsung has not even started beta testing to all Eligible Phones globally..First it is to be Successfully beta tested (Bugs got fixed & it got stable) Then it will go Officially to Fold→Note10 Series→S10Series and then Note9 series..And it won't be Possible before Mar.-Apr.'20 by looking Past history of Samsung..Please note that I am not sure whether Fold is coming with Android 10 out of the box or not, hence take it accordingly...
