(1st, 2nd, or 3rd generation), you likely cannot roll back to or specifically "target" 14.7 if your device is already on a newer version. However, if your
is currently on a version older than 14.7 (like 14.2), you may still be able to update to the latest compatible software for your device. How to Update Your Download iOS 14.7 for iPhone SE
If you are specifically looking for what was included in this version, it introduced several improvements and bug fixes: (1st, 2nd, or 3rd generation), you likely cannot
If an update is available, tap Download and Install . Key Features of iOS 14.7 or 3rd generation)
Added the ability to manage timers on HomePod from the Home app.