Need help editing a photo

[C1239]

Really random question, I’ve googled online but having no luck! I’ve got a lovely group photo but it was taken at an angle and I want to straighten it out so I can print it. I’ve managed to straighten it on my iPhone but it cuts the two people on the end out, does anyone know how I can zoom out straighten it then edit it?!

Go to camera roll, select photo then pinch with two fingers to kind of minimise it where you can see the other photos on your camera roll in the background. Then (using dexterity) screenshot so the photo is smaller. You can then straighten, and when you're happy with that use the crop function to get it back to normal size. Should have no people missing !

Not sure I've explained that well but I know exactly what I mean 😂