my air 5 external moniter dont work

Basic screen mirroring should be available to an external TV or connected monitor with iPadOS 16.1. However, Stage Manager support for external monitors is not yet available - this feature being planned for release later in the iPadOS16 lifecycle.

Disable Stage Manager from the Control Centre; screen mirroring should be restored.

Same here, but here's more.

I have a KYY portable monitor. Worked fine with any USB-C cable or even USB-C to HDMI adapter. After the IPadOS 16.1 update, it only works with the cable that came with the monitor. Not even an Apple USB-C to USB-C cable (came with mbp) works with it.

Currently, you can ONLY mirror and iPad's screen to an external monitor.

Apple has not, as yet, officially added external, extended monitor support to the new iPadOS 16 Stage Manager feature.

Look for Apple to, officially, release the extended monitor support, to the iPadOS 16 Stage Manager feature, in a future iPadOS 16 update.

Sorry

Also, there appears to be more and more Apple Support community postings on this issue.

Apparently, there is a problem with all Apple HDMI video adapters on iPadOS 16.1.

Hopefully, Apple will, soon, fix this issue, in a future iPadOS 16 update.

In the meantime, you can post unacknowledged iPad/iPadOS feedback, on this issue, with Apple by tapping the link below.

Feedback - iPad - Apple

Have you tried:

Restart your iPad - Apple Support

Finally with iPadOS 16.2 it’s been fixed!

You are not alone:

iPad external display - Apple Community

I would formally inform Apple:

Feedback - iPad - Apple

Exactly same thing here with my iPad Air 4th gen! Screen mirroring to my TV (using an USB-C to HDMI adapter) stopped working right after updating to iPadOS 16.1.

I even tried restoring my iPad to factory settings but it didn’t work either.

Hope this is fixed in the next iPadOS version release.

If you have this same problem, please give your feedback to Apple:

Product Feedback - Apple

They will only fix the bug in upcoming iPadOS versions if they receive enough complaints about the issue. That’s what I’ve been said by Apple Care support staff.

Currently, you can ONLY mirror and iPad's screen to an external monitor.

Apple has not, as yet, officially added external, extended monitor support to the new iPadOS 16 Stage Manager feature.

Look for Apple to, officially, release the extended monitor support, to the iPadOS 16 Stage Manager feature, in a future iPadOS 16 update.

Sorry