Large text & zoom mode on

My aunt is having an issue with her new iPhone. She has the text size larger than most bc she wears glasses and she also has “zoom mode” on. The issue is when she tries to make a phone call the green button is almost entirely off the bottom of the screen / behind the contacts / keypad (see screenshot) I have tried for the past couple of hours to rectify the issue, but I was not able to figure it out. Is anyone else having this issue with new iPhone / newest IOS?

[Edited by Moderator]