xcode not recognizing screen size height 677

Question

I have an app I am updating because of the Launch Screen requirement instead of launch images. In so doing I came up with many many warnings that "views without any layout constrainsts may clip their content or overlap other views". When I went in and tried to address the problem no matter what I did the warnings multiplied. So I am attempting to rewrite my code to get the screen size and place and size my objects for each phone. The problem is that Xcode apparently does not recognize iPhone 6 screen size on the actual device. In the simulator iPhone 8 is recognized but I don't have an actual iPhone 8 to try out. I would assume it is the same size as the iPhone 6. I have looked on line and I saw this was a problem and possible fixes were to "make sure iPhone 6 launch images were available", but since launch images are no longer that isn't a solution. I also tried

if([UIScreen mainScreen].fixedCoordinateSpace.bounds.size.height == 667.0){

also but that didn't help either. I can't believe Apple doesn't want to have developers not get the screen size for iPhone 6.
Is there a work around or new way to get screen size for iPhone 6?
Does this problem happen on iPhone 7 and 8 and iPhone 6,7,8 +? I just saw that I have to include specific sized launch images with my launch screen with specific names. Is this true? How do I do this? Is there a GOOD tutorial? I am at my wits end and need a solution. I found a place where I created and installed images for all iphone and ipad portrait sizes and put them in Launchimage in my image asset folder. my app only runs in portrait so I didn't think I needed to make landscape images. Anyway, even with all the correct size images, iphone 6 4.7" and 5.5" it still launches seeing the iphone 6 as a 5. In fact now it launches with a blank screen no launch images showing up at all.

So I added the landscape views and had forgotten an iphone portrait view. Now in the simulator iphone 8 and 8+ are recognized as the correct device by height but the launch image still isn't loading for iphone 8 and 8+ as well as ipad 7gen, air3gen, and pro 9.7. Only loads images for iphone11, 11pro, 11promax and ipad pro11 and 12.9. On the actual iphone 6 the launch images isn't loaded and it still is recognized as an iphone 5. This has to be a Mess up by Apple.

Suggestions? Thanks