You recently added a navigation bar to a test application (on IOS), and the navigation bar downloads the entire view of the application below (look at the picture)
Here is a link to the project: Thunkable
Deleted as I forgot to take a look at your project link. try adding a margin to it, to help it maybe.
Make an if statement, if ios, set margin to whatever. Although this issue is thunkable and not you have coded this.
The problem is only caused by a live test in Ios. If you install the application on the device see the button