How to factory reset an iPhone XR with the bottom half screen is broken and you do not have a computer?

I have an iPhone XR and the bottom right half of the screen is cracked. I’m trying to factory reset and I’ve gotten all the way to the continue button but I can not press it.. if only the screen would rotate then I can do but in this case it doesn’t. I’m trying to sell this phone but I don’t want my info on it. I have done the reset and the find my iPhone to delete my profile but when I turn the iPhone XR back on all of my stuff Is still on it. What can I do?