I’ll also help you understand any issues you may encounter while updating.
Fortunately, the process is quite simple, but back up your iPad before following these steps.
Here’s how to update an old iPad.

The process is the same for any age of iPad but how much you could update it may vary.
On your iPad, tapSettings.
Wait for your iPad to finish searching for updates.

The older the iPad, the longer this process may take.
TapDownload and Installto complete the update process.
check that to set enough time to see this process to completion.

The steps below relate to using a Mac with your iPad.
Connect your iPad to your Mac.
In Finder, poke the iPad name in theSidebar.

You may also need to clickTruston the iPad.
Wait for the update to finish and for your iPad to restart.
This can take some time, especially with older iPads.

Can My iPad Be Updated?
Here’s a look at which iPads can be updated and to what operating system.
What Do I Do if My iPad Wont Update?
There’s no way of updating an iPad to a version of software the hardware doesn’t support.
FAQ
First, open theApp Storeand select your profile image in the corner to open theAccountpage.
Scroll down and selectUpdatenext to an app that has a new version available.
you might also selectUpdate All.
Safari updates along with iOS or iPadOS; you could’t download a new version separately.