My iPad won't let me update safari It says I have updated but when I try to access it wants me to update

Safari is an integral element of iOS/iPadOS - and cannot be updated independently of the OS. If your iPad has been updated to the most recent version supported by your iPad (the model and installed version of iOS have not been declared), then Safari is as up-to-date as is possible. If your iPad is very old, your browser may simply be unable to render modern websites.

However, some websites incorrectly identify your iOS/iPadOS Safari User Agent. Recent browsers can usually operate in two different modes - these being Desktop and Mobile. Sometimes websites will misidentify the browser - and report that it requires upgrade. Switching the browsing mode can often resolve this problem.

For recent versions of Safari, it’s easy to switch between modes if a website isn’t functioning correctly. From the desired web-page, touch the aA icon at the left of the Address Bar; this will reveal a menu. From the menu select Website Settings, then select (or deselect) Request Desktop Website, then tap Done. Now refresh the webpage.

The chosen setting will be saved for the selected website - and can be simply reversed if needed.