This option will only availabe for flagship series like s9 and note9. We are not 100% sure that we will get it but we can see this in beta phase so we might get it. It was dicover by a senior member of XDA developers. Note mid range and budget samsun...
So, first of all it is not going to release worldwide, only samsung s9 and s9 plus users in Germany,Usa,india,korea and uk will allowed to take a part in beta testing. Other thing is that beta testing is only available for s9 and s9 plus even people ...
now its a matter of a week maybe that it will reach internationally or if you can't wait then download the UAE's version from sammobile and flash it on your devices manually using odin.
u can do it manually if it fails automatically, just go to sammobile.com and search ur model in firmware section you will get the latest firmware but if something happens it can even brick ur device