how to take portrait picture in portrait mode for 2 or more persons

hi i am using Iphone 15 pro max

in portrait mode i am trying to take picture of my daughters and the phone is focusing only one of them but not both.

i want to take portrait photo with background blur or you can say depth of field or bokeh effect.

but the problem with iphone is that it focuses only on one person at a time.

after taking picture i tried to edit the picture in the phone but i can choose either one of the girl but to focus on both the girls it doesnt work.

any suggestion?