Recently, with Xcode 26.6, we've been unable to install apps on some physical devices (iPhone, iPad). Some devices work fine.
An alert saying "Install Application not available" appears. I reported it through Feedback Assistant, but someone from Apple replied that it's an issue with Xcode 27.0 beta and told me to install the latest Xcode 27. However, I'm actually using Xcode 26.6. The issue is still unresolved, so if anyone learns anything, I'd appreciate it if you could share an update.