Hi Hemlata, I'm Ramesh, here to answer your query at the Microsoft Community.
If Windows Update doesn't offer the Windows 11 Feature Update for some of your devices, those computers could have incompatible software or drivers.
Please see if you can use the Windows 11 ISO for an in-place upgrade.
- Download Windows 11 Media Creation Tool (MCT) from this link:
https://go.microsoft.com/fwlink/?linkid=2156295
- Run MCT and download the ISO it recommends for your system. Do *not* uncheck "Use the recommended options for this PC".
- Right-click on the downloaded ISO and choose "Mount." This assigns the ISO a drive letter.
- Run setup.exe from the ISO drive. This starts the repair installation.
- This starts the setup dialog. In the initial screen, click “Change how Setup downloads updates”
- Select “Not right now”, and continue the process.
(Your files, settings and applications will be preserved if you use the ISO recommended for your system by the Media Creation Tool.)