After updating to Xcode 26 RC on Tahoe 26 RC and iOS 26 RC (and now final version of both Tahoe and iOS). I'm still unable to debug on device. I've tried rebooting, resetting settings, cleaning trusted computers. I ran out of ideas, I was expecting that final versions would fix this but they didn't.
Xcode not showing devices as run destination
Have you tried pairing the device again? Sometimes it seems to stop trusting the computer. It also might be worth confirming tho os version on the device and the deployment version set in the project.
@NSCabezon After you navigate to Window > Devices and Simulators, does your device appear in the Devices section of the appearing window?
If your device appears in the window, check that the value of the deployment target of your project is lower or equal to the OS version of your device.
If the device doesn't appear, unplug your device, quit and relaunch Xcode, then plug your device and try pairing your device again with Xcode.
I'll explain what I experienced and how I "solved" it. iPhone was not detectable in any way (nor was the apple watch), I tried getting latest beta of Xcode, I tried latest stable release, nothing seemed to work. I waited for final release which came up shortly and still no luck. What ended up working was a thunderbolt cable. I went to an Apple Store and they told me to wipe the phone completely because I still had the beta installed, which attending to build number was wrong, but something was off so I wiped the phone. That fixed the issue, although I lost a couple of pictures and some minor data for apps that didn't save it in cloud.
Hope this helps someone in the future :)
As a side note, debugging on an Apple Watch is becoming really really difficult... sometimes it just does not want to connect