Pop up window scrolling issue on iPhone

I was recently doing an application for a PPP loan and on the last page a window popped up asking me to edit some information. I did so, but the "Save and Submit" button was masked my the navigation bar and I can't scroll down. When I turn my phone sideways and then back to vertical I can see the button, but when I push it the nav bar pops up and covers it up again. NONE of the tricks I have found here like two-finger scrolling, disabling JAVA, playing with zoom works at all. I am seeing posts about this going back to 2010 and it is unbeleivable to me that it is still an issue. Get your **** together Apple. I spent a lot of time on this application and now I can't submit it.