You can actually download the specific iOS versions you are looking for from this GitHub. For steps on how to install the file, check here: https://medium.com/macoclock/how-to-add-device-support-files-to-xcode-ce4ca5965092
I'm running 13.2.1 and I have up to 15.2
Topic:
Developer Tools & Services
SubTopic:
Xcode
Tags: