Be careful with what sellers call “Pakistan”. If it is the named cultivar from a reliable grower (e.g., Dave Wilson) then it is a Morus alba. These trees were brought to Pakistan (and elsewhere) from China millennia ago.
For folks who have the room (including 20’x20’ for invasive roots): White Fruiting Mulberry, specifically the cultivars ‘Tehama’ and ‘Hunza White Seedless’.