To change text size on a physical iPhone you'd just go to settings and then increase or decrease your text size. On the simulator that setting doesn't exist so you need to use the menu item in macOS to change the text size:
Features -- Increase Preferred Text Size or Decrease Preferred Text Size
You can also use Command + Option + Plus or Command + Option + Minus.
Before this I was having issues debugging an issue that was reported for my mobile app. Here's the app I'm working on in this video: https://apps.apple.com/app/id6467687675 (homepage here https://neurtureapp.com)