Unfortunately it won't get one ui 7. Only two major OS updates were to be given to this phone, which it already got in terms of one ui 5 and one ui 6. For one ui 7, you need to buy a new galaxy phone.
You will be get it maybe before end of this year. If you like please accept it's as a solution it's help to others users also,click on 3dots in my reply section and click on accept solution. Thanks.
