So a few info first. I have an iPhone 7 Plus running iOS 13.5.1. The most recent Xcode version my old Macbook can run is Xcode 11.3.1 which allows to set the deployment iOS target up to iOS 13.2. I have made a very simplistic app only for personal use that I install from time to time on my iPhone. It doesn't even need internet. I've noticed that even if I set the deployment target to iOS 13.2 on Xcode, the app can run normally on my iPhone running iOS 13.5.1. I want to install iOS 14 versions on my iPhone but I worry that I may not be able to install or run this app on my iPhone anymore. I can see it worked so far even with my iPhone running a newer iOS version than the deployment target (both being versions of iOS 13) but will it continue to run on iOS 14? I'd like to see your opinions or a comment if anyone has tried something similar. Thanks in advance.

I have created a very simple app on my iPhone running iOS 14.5.1 It's only 1 white page cause all I needed to do was location simulation. My Xcode is 11.3.1 and I don't want to update to MacOS 10.15 so I'm stuck with this version of Xcode. So after finding, downloading and unzipping the iOS 14.5.1 device support files, i transferred the folder and the building of the app was done successfully even for deployment iOS 13.2(that's the newest that appears for me in Xcode). Once the building is complete I see it says "Running" for a few seconds and then I get the message "Unable to copy symbols from this device - Xcode was unable to read the required data from the device" and I can only click Cancel Running. I've been searching for solutions for 2 days now and no result yet. I've tried rebooting my macbook, the xcode app and my iphone. There is enough space on my macbook. Please any other solutions I could try? Really appreciate anyone's help in advance!